Also as far as I can find there is only one size 2.65" mains for all 400's. NO MISTAKE! The last year of manufacture was 80. The letter is the month, A= January, B=February, etc., the next number is the day of the month and the last is the year. Here is a link to a thread where this was discussed in detail, http://www.nastyz28.com/ubb/Forum5/HTML/011356.html. Tom, That is great idea. We also mocked up the engine to measure deck heights and then had Barrington machine the deck surfaces to create a much more consistent deck height. These listings are always a work-in-progress. Test 3 added a Wilson-tapered carb spacer and a set of Comp 1.6:1 roller rockers and performance pushrods. That because the 400 is only block (aside from the 454) are externally balanced. The block I originally asked about is one that has been bored over .40, roller rockers, and pop up pistons, and double hump heads. Assuming of course that it isn't worn beyond boring. It seems that almost everyone else on this board, including some very knowledgeable people all say the webbing is thinner on the 4 bolts and are more prone to crack there. Thanks again!! Thanks! The small-block family line was honored as one of the 10 Best Engines of the 20th Century by the automotive magazine Ward's AutoWorld. Domed pistons with small chambered heads is going to be a lot of compression, probably over 11:1. which is more than you can run on pump gas. There extra weights added to it, and the harmonic balancer is notch to offset the balance. Steam holes are good idea regardless of the head choice. what is the BEST 400 block casting to be on the look out for? i have a sonic checked, hot tanked 400 for sale, but you are a BIT too far from me. Jun 15, 2004. Look in the 70"s Vans. You will still have to hone this new block, so factor in that costit's worth considering before investing $800 in a 40-year-old block. We would like to thank everyone that has contributed to the . Chevy V8 SBC Block and Head Casting Numbers. I can not say that I have any empirical data. If you have some knowledge of why the 70 - 71 4 bolts are better, please share it with us. It is said that the 2 bolt main block is stronger than the factory 4 bolt. I thought the old 511 was a 4 bolt main engine. Looks like it should be pretty simple. So this is will be a 2 bolt main if I am not mistaken? John more info will be needed. We looked up the price of a Dart SHP block from Summit. Chevy V8 "W" Motor 348-409 Casting Numbers. Different chamber volumes, port volumes, port locations, valve sizes, etc. Lieb suggested an internally balanced crankshaft assembly that would require 6-inch rods and a short- compression-height piston to allow room for larger crankshaft counterweights. Additionally, the major crankshaft of 400 small-block engines was externally balanced and had a diameter of 2.65 inches, while the 350 . So I'm going to deal with the block I have.I mean I paid $50 for it, I'm not going to complain. For a better experience, please enable JavaScript in your browser before proceeding. Any help decoding the rest would be appreciated. You must log in or register to reply here. I'm with Schurkey on this one. Here is the difference in the flat side of all SB blocks and the extra bulges on the sides of all SB400 blocks. Feb 13, 2012. Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F . I have a Burn 2 Chip, and due to the noise of the camshaft on 400 (no roller) It was recommended by a few to disable it. Good luck with your search. Our theory is that the valvesprings are right on the ragged edge and became "fussy" in this rpm range. Not sure why you would disable the knock sensor on a computer controlled engine. although it sounds like I'll need to find a flywheel too, perhaps more involved. The 350 features a shorter stroke of 3.48 inches, whereas that of the 400 is 3.75 inches. Flywheels are available from after market sources. It will take a lot more abuse. The folks at hotrodders told me to head over here for some info. 509, 511, 817 etc??? The stock 4 barrel 402 BBC has a 4.126" x 3.76" stroke. 4. Either 175 hp or 200 hp and originally in a pickup truck. Back in the May '11 issue, we brought you the first part of our budget-built 400 small block Chevy. I can't find any numbers on them. The 3951509 block is the most sought after 2 bolt 400 block. We also drained the 10W-30 break-in oil and tried some thinner-viscosity Lucas 0W-20 race oil, hoping to push over the 500-lb-ft plateau. I also disabled VSS and EGR. It is in a 1979 elcamino the i got it off says it a 350 vette motor im not sure, Copyright 1998-2019 Mortec. Allow me to ask another question although a little more involved lol. I found all the other codes below. I wouldn't use a stock block though, you can get new ones from Dart that are much more reliable. It's actually for a truck that was given to me with a bad clutch and sat til the engine rusted up, the truck is a 1975 step side 4x4, I have a full F-body TPI setup I got years ago, I believe it's a an early setup, but I'd like to place it atop either a home built 383 or a 400 inch small block with hydraboost brakes from an astro van, nothing fancy, but a good solid light work truck and fun run around, I tend to hit a whole slew of P-n-Ps in a single day, and I think I've been to most in mid California. Code identification, Casting Number info. If you have stock heads and bottom end the compression is low. The 5.7L TBI is probably a little lean for the 400. The dip is more pronounced in Test 3, which is where we added the rocker ratio. The difference was astonishing. The 400 is based on the small block design and is easily the biggest engine in its family of small block engines. so i wonder it was worth buck for $500? It has a high rise manifold, full headers, whole 9 yards! The cam failed with less than a week before our deadline necessitating an unplanned thrash to rebuild the engine a second time because all that dead cam metal wiped out the main bearings. This casting # has been used in many different versions of this aluminum 18 and 15 Bowtie race head. BTW those are circle track valve covers and do not vent the crankcase well. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! 3956618 Small Block V8 1969 302, 4 bolt, . If so, can a 454 flexplate work much the same way as the flywheel? Far as I'm concerned, the best one is any 2-bolt block that doesn't have core shift and will clean up at .030 or less. Chevy V8 BBC Block and Head Casting Numbers. You'll find one at Pick-n-Pull no prob! The limitation seemed to be valve lift, so we thought the simple addition of a set of 1.6:1 rocker arms might help. While this block is more expensive, it's a new casting with four-bolt mains and 350-size main journals, which means slower bearing speeds over the larger stock 400 size. 330817 1970-80 400 150-180 2 bolt. Small Block Casting Numbers Lookup. Block casting number would be a good start. I swapped it out for a 400 SBC 3591509 block 2 bolt main. Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side. Some engines just won't go away. Chevy Small Block - Engine Block Casting Numbers Notes (for below): "High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in. Chevrolet Small Block Head Casting Numbers. In the past 25-30yrs, I have built about 25 SB400s from all castings and have never seen a problem. I think these engines have all but disappeared from the pick-n-pull yards ~10-15 years ago. it all new freeze jacket, new cam bearing, manaflux, sonic, honed . Chevy/Olds Rocket block 4.00"-4.190" bores 400 mains journal sizes splayed steel caps wet sump raised cam 2-piece rear seal 9.300" deck. If that's a complete short block, sonic test is good, and you can use same crank, then $300 doesn't sound too far out of line. Some have the better metallurgy with 1% added tin and 2% added nickel, which increase the strength of the cast iron block A LOT. Personalized Cutting Board, USA Handmade Cutting Board - Personalized Gifts - Wedding Gifts for the Couple, Christmas Gifts, Gift for Parents, Anniversary Gift. You've probably already jumped ahead to the dyno test, but if not, the new torque numbers came in at a tire-shredding 501 lb-ft at 4,000 rpm, and horsepower leaped up to 466 at 6,000 rpm. Note how the shape of the curves remains basically the same, since we did not change the cam, heads, intake, or exhaust. Yes it will be a 2 bolt main. Generation I Small-Block 10036033 Small Block V8 350, 4-bolt, Goodwrench crate engine, 2-piece rear seal. JavaScript is disabled. ALL small blocks except the SB400 have balancers that are smooth all the way around the outer ring, but the 400 balancer has a BIG notch (relief or whatever you wish to call it) about half way around the outer ring. Forum software by XenForo. 1. Can someone provide me with kohler reviews. If desired the caps could be changed to aftermarket 4 bolt caps that use a splayed outer bolt configuration and having the block aligned bored. Although the 400 block you have has the larger crank journals, the better block to try t find is a 70 - 71 model, 4 bolt main block. The most obvious change to this different rotating assembly is that with a 6-inch rod, the piston compression height becomes very short, which moves the wristpin up into the oil control ring. Here's another thread with pics of it. 3951511 1970-80 400 255/265 2/4 bolt Some replacement blocks had 2-bolt main caps. I currently have a 1985 SWB that came with a 305. There is a space where the 1 should have been. Block is a 330817 casting. Also, I must agree with the above about spending a little extra and going with an aftermarket block, IF YOU CAN'T FIND A GOOD USED CORE. Save. *These separate part numbers and prices for the pistons and rods are for reference. it was a 2 bolt block out of a 76 station wagon. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Chevy 400 Small Block Engine Numbers 9 out of 10 based on 212 ratings. This would make an excellent street engine. This requires an oil support ring that is supplied with the pistons. The stock 2 barrel 400 SBC has a 4.125" x 3.75" stroke. Locating a good SB400 core is becoming more difficult. My guess it was left off the marker tray used when casting the block. Chevy V8 Crankshaft Casting Numbers. That would put your compression around 10:1 with better street manners. The only information I have is of a personal experience nature and that is, that the 511 4 bolt block that I have been thrashing on for more than 20 years, a 1/4 mile at a time, is still in one piece. The Fora platform includes forum software by XenForo, http://www.youtube.com/watch?v=wCG7lnacgGg, https://www.youtube.com/watch?v=53OG2K2P9vQ, http://forums.corvetteforum.com/c3-tech-performance/2504818-400-block-vs-350-questions.html, http://www.northernautoparts.com/ProductModelDetail.cfm?InventoryId=409107, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. When I did my 406 a lot of the "available" blocks were not good candidates for a buildup. Thanks! Also some had 3 freeze plugs instead of the more common 2 but there were also 400's with 2 freeze plugs but the 3 were 400 only. The block was so nasty it demanded help while retaining the stock crank, pistons, and rods. I have heard of guys taking 5.0 'stang engines apart at 100,000 miles and not . Whether intentional or not we will never know, it still is a 509 block with a unique difference. It may not display this or other websites correctly. I could run it until it blew up but heck that wouldn't be fun. 5.0 out of 5 stars 4. . Small Block Chevy engine identification. Ok I found this drivers side of the castingGM #3970010. 4. V11i5we. The 509 is the one you want, early model 2 bolt block. 3951511 Small Block V8 1970-1972 400, 2 bolt or 4 bolt. We also tried a 1-inch-tall Wilson tapered spacer that was worth roughly 3 hp at the peak with no loss of torque down low. We will not spend too much space documenting the assembly other than to mention that we did have to mix in quite a few Federal-Mogul 0.001-inch undersize bearing halves with the Scat rods to get bearing clearances to achieve our ideal 0.0025-inch clearance target. It is right on the limit, if it would have a couple of cubic inches more, it would have been a big block. The big news is the huge gain in torque between Test 1 and Test 3. By the time Barrington finished squaring this block and making the holes round, the thought occurred to us that we had $800 invested. Generally, an increase from 1.5:1 to 1.6:1 rockers is usually worth about 0.030 inch of valve lift, and since our cam barely made 0.490-inch lift, that seemed like a good solution. In my family, there are 4 SB400s. Looking to buy interior A pillar trim for my 70. Once our machine shop, Barrington Engines, ensured that all the cylinders were properly bored, the torque plate was honed, the main bearings were align-honed, and the decks were level, we had a great foundation. The plan was to retain the original test's cam, Vortec heads, Weiand intake, Holley 750-cfm carburetor, and exhaust headers so we could honestly evaluate the power increase from better cylinder sealing and a bump in compression. No portion of this website may be copied or reproduced without permission. I'm trying to find out what year my engine is horse power an all the stamp num is. It runs good except it has developed a pretty nasty piston slap when cold. Rather than kick the motor to the curb, we decided to build this engine correctly. Dished pistons with 76cc heads, around 8:1. I'm not looking to make a ton of power with this motor. The guy I bought the motor from said they were 350 rods. All production 400 small-blocks were built as externally balanced engines. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. . As said above, stay away from 4 bolt blocks, they drop the bottom out pretty often. Here is a list of casting numbers, along with their original applications. It has clearly 395509 on the block, but obviously most are stamped 3951509. Best-Selling House Plans, Completely Updated & Revised 4th Edition: Over 360 Dream-Home Plans in Full Color (Creative . According to Mortec.com the 400 crank cast # is CSK is 1973 Fullsize Station Wagon 400 ci with TH350, 150hp. I am sure there are a ton of room for tweaks! The piston slap when it is cold was happening when it was carbureted, I think it just got a top end overhaul before I got it. The Chevrolet small-block engine is a series of V8 automobile engines used in normal.. You are using an out of date browser. It will show you which Gen III V-8 engine blocks are desirable, identify them via casting and service part numbers, and then give. JavaScript is disabled. Nothing outrageous, Just somthin to have fun with. #4. . It really runs great and smooth, but I will keep my eye out for a 454 TBI. 45 years in auto/truck industry.Blue Seal Certified Author of auto/truck repair information.An adaptable, detail-oriented, world-class automotive technician with a demonstrated track record of experience in product/technical support, automotive shop management, diagnostics, root cause analysis, maintenance/repairs, quality assurance, customer service, training and mentoring, and staff . Also why 70-71 years? The numbers stamped on the block in front of the passenger side head and the casting numbers and the date codec on the bellhousing ledge. For a better experience, please enable JavaScript in your browser before proceeding. "Main Caps" is the number of bolts holding the cap. I managed to get a profile that doesn't kick off the CEL and run smooth. It comes in at $1,499.41 (plus shipping). Best 400 casting to use is the one YOU have laying around. 22551656. Small block casting date is located on driver side rear of block on flange forward of bellhousing. E.g. Dec 12, 2016. This graph illustrates the big differences in torque between the previous combo and our latest version. All this really proves that quality machine work and proper engine assembly techniques really do pay off with big rewards. By the time we were finished, we had never worked so hard to produce so little power. This package costs a little more than the standard 5.7-inch rod and cast crank system, but it offers much greater durability. The block casting number on smallblock and big block Chevy V-8 motors is located on a ledge found at the rear of the block, most often on the driver's side. Yes it will be a 2 bolt main. Look on the passenger side deck, right behind where the alternator sits and get the suffix code, with it we can find out what your 400 came in from the factory. We were underwhelmed. Just somthing to get me into the low 13's-mid 12's. Stockton California or Stockton Blvd Sacramento are the best P-n-Pulls, 1970 Chevelle, 489, Lunati solid 292/301, .625/.625, 259/. All are doing fine and none are 509 castings. I have the correct crankshaft(3951529) and I was wondering where the casting numbers for the connecting rods are located. In case you missed the story, the best power numbers were gained with a set of GM Performance Parts Vortec heads supplied by Scoggin-Dickey, and even then the 400 small block Chevy managed only 401 hp and 458 lb-ft of torque. Moreover, the 400 has 5.565-inch rods, and the previous SBC engine offers 5.7-inch rods (a higher compression engine). Small Block Chevy Casting Numbers. The problem with building a performance 400 that might see rpm above 6,000 is the external weight spinning around on the crankshaft snout; it acts like a rock on the end of a string, adding load on the crankshaft that could cause eventual failure of the front main bearing. The consensus on 400's seems to be 2 bolt mains are best and the strongest to weakest casting numbers ending in 509, 511, and 817, with the markings 010 020 high tin and nickel being the most . If desired the caps could be changed to aftermarket 4 bolt caps that use a splayed outer bolt configuration and having the block aligned bored. Don't forget to follow us on Facebook, and if you run a website or write for a blog, please link to our site! 400 only : 2 or 4 : Casting Number Year . Right away, we ran into snags. Block casting number would be a good start. The fix is a different (not necessarily higher load) valvespring that would probably take care of this. Free shipping for many products! Type your engine block casting number in the SEARCH BOX below. Block is a 330817 casting. The 511 is the 4 bolt block, also desireable, the 817 is the late model 2 bolt block. We did cheat a little with a couple of new parts, but you'll have to read the whole story to find out what we did. I use TunerPro RT. Although I don`t recall the casting numbers, the block had "509" casted on it under the timing chain cover and on the rear of the block, it was also a 10 20 block, indicating it had nickel and tin mixed with the casting which are more disireable. The added nickel is used in a lot of newer blocks, GM and ford among others. Please let us know what leads you to recommend a 4 bolt 400 block over a 2 bolt. NEW SOUTHWEST SPEED CHROME PLATED LAKE STYLE HEADERS FOR SMALL BLOCK CHEVY 265-400 V8 ENGINES, 1 5/8" TUBES, STREET ROD, HOT ROD, RAT ROD, NOSTALGIA, VINTAGE, 265, 283, 302, 327, 350, 400 ci MOTORS. With those heads using a dished piston would be optimum. Are flexplate for a 400, scares? Chevrolet Small V-8 Cylinder Block Casting Numbers. Test 1 is the best power we pulled from the original test of the engine from the May '11 issue. I'm not sure thats why I'm asking. Additionally, if you want more products to add to your collection, our list of the best 400 small block casting numbers on the market is a great place to start. 6 Best Tuners For 5.3 Silverado Review 2022; Top 7 Best 5.7 Vortec Headers in 2022 [Review] SBC BBC V6 Chevy Engines Specs and Sizes [With Chart] The biggest problem now seemed to be that we needed some way to make the engine breathe better at higher engine speeds to make more horsepower. It comes in at $1,499.41 (plus shipping). Year One 350 Chevy Crate Engines Fully Year: Cubic Inch: HP/ Torque: 1964: 409: 340/420: 1964: 409: 400/425: 1964: 409: 425/425: 1965: 327: 350/360: 1965 . Right at the first pull on the dyno with 36 degrees of timing (versus 44 degrees with the old engine), the 406 grunted out 486 lb-ft of torque compared with the previous 458 and produced between 20 and 30 lb-ft of torque increase across the board with similar gains in horsepower with the peak of 436 hp at 5,200 rpm. It's important to note that this support ring comes with a small dimple that should be placed with the raised portion facing down so it will not move relative to the piston. Do you think vortec heads with drilled steam holes would make the compression on my current engine too high or do you see a benefit from it? The above info represents 1955-85 only. 22551660. For a better experience, please enable JavaScript in your browser before proceeding. I had a 406 is high school, loved it. Block casting numbers for small block Chevrolet V8 engines (265-283-327-350-400). The Vortec heads have a smaller combustion chamber and would increase the compression, but some have small valves and small runners. I have the correct crankshaft(3951529) and I was wondering where the casting numbers for the connecting rods are located. The consensus on 400s seems to be 2 bolt mains are best and the strongest to weakest casting numbers ending in 509, 511, and 817, with the markings 010 020 high tin and nickel being the most desired. And, the fastest thing to look for is the harmonic balancer. Generation I Small-Block. Without knowing the year it is either a 283 (1965) or a 307 (1968). I asked about this block, due to it being available. Chevy V8 Casting Number Locations. The main bearings were easier because Barrington align-honed housing bores, which established more consistent bore diameters. Apr 12, 2017. were used. Find many great new & used options and get the best deals for CHEVY V8 ENGINE CASTING NUMBERS SMALL BIG BLOCK CAR TRUCK 1955-93 Chevrolet book at the best online prices at eBay! By doing that inaudible detonation could be destroying the engine and may be the reason for the noise on cold start. Since it's always a possibility that we will lean on this engine harder at a later date, we opted for the internally balanced rotating assembly and had Scat balance it for us. I have a 400 SBC that has a 6 digit casting ID. 4-bolt Bowtie Aluminum 400 Mains/Bore: 10125327: 350: 93-up: Camaro/firebird 2 & 4-bolt LT-1 Reverse cooling Roller cam: 10090511: 350: 90: 4-bolt LT-5 ZR-1: 10066038: 350: 2 & 4-Bolt Mexico cast Crate engine: SBC Block Casting Numbers. All these little efforts really paid off. . But I have been told that 350 & 400 rods are 5.7 rods. 14102058 . Chevy 400 Small Block Engine Numbers. Lots of good info, it sounds like it'll be easier than I thought! So it's turns out it is a 350. Test 2 is with the same Bow Tie Vortec heads, Comp cam, Weiand intake, Holley carb, and dyno exhaust with no mufflers. I have guy want to sell his 80K mileage 400 ci 509 casting block with 2 bolts.. but it already machined work and bored to .030 = 406ci also come with stock 10/10 Crank polish n balanced. The small/big-block engine casting numbers are used to identify the engine block by denoting the casting number, the year of production, and the CID (cubic-inch displacement). I then converted it to TBI using the ECM out of an 89 truck with a 5.7 and had the knock sensor disabled in the ECM. But look carefully at how the horsepower curve dips slightly between 5,300 and 5,900 on Tests 2 and 3. While this block is more expensive, it's a new casting with four-bolt mains and 350-size main journals, which means slower bearing speeds over the larger . small journal : 3892657 : 67 : 327 : 2 : 3892657 : 67 : 350 : 2 : Camaro : 3892657 : 64-67 : 350 327 & 302 : 2 : . One other possible advantage is the improved rod-length-to-stroke-ratio from the 6-inch connecting rods. A "two-bolt" main, or a four-bolt main. Thanks! Dipstick is in the oil pan. With an increase of two full points of compression and good ring seal, we expected some serious power improvements over the stock baseline, and we weren't disappointed. The build of the blue 400 may not be optimum. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. In other cases I've seen casting numbers so screwed up with casting flash and left over sand from the casting process you couldnt even make the numbers out. We are already thinking about how to make even more power with this 406ci, and we might have to start calling it the BFH because it brings down the big freakin' hammer on torque. Four bolt main blocks are desirable in high performance applications because the extra strength of . Car. The rockers alone were worth almost 20 hp, which helped us excel to 501 lb-ft of torque and upped peak power to 466 hp at 6,000 rpm, and the engine responded positively to nearly all the changes. I built a factory 4 bolt main 400 using ARP main studs. Namely the 400 small block. JavaScript is disabled. Here is a list of casting numbers, along with their original applications. We do know your 400 is a small block and has a 4 barrel carb and manifold added. 72 Chevelle, 77 Nova. The date code is on the back of the block on the bellhousing ledge, it is the casting date. If you don't mind searching around, I'm sure you will eventually come up with a good core. Could I take my engine out, put the intake, TBI, valve covers, headers, etc on it and be good? Using a flywheel from a 454. But, to answer you original question, it is the general consensus of opinion that the 509 is the most desireable casting. Compression test were decent, but one cylinder on the passenger side was lower. 3951509 1970-80 400 only 150-265 2/4 bolt. Chevy/Olds Rocket block 4.00"-4.190" bores 2.45" main journal sizes splayed caps dry sump 2-piece rear seal 9.025" deck. The 511 is actually the more desirable casting and the old saying on these blocks is that 2 bolt is stronger because there's more meat on the cap. A higher compression engine ) the 3951509 block is stronger than the factory 4 block... Was a 2 bolt main engine log in or register to reply here perhaps more involved.! Engine in its family of small block Chevrolet V8 engines ( 265-283-327-350-400 ) TBI is probably a little involved... Sbc 3591509 block 2 bolt main block is stronger than the standard 5.7-inch and! Little lean for the pistons will eventually come up with a 305 for my.... A factory 4 bolt loved it '' blocks were not good candidates for a better experience please! Or stockton Blvd Sacramento are the best P-n-Pulls, 1970 Chevelle,,..., 150hp back in the flat side of the engine from the 454 ) are externally.... Biggest engine in its family of small block V8 1969 302, 4 bolt the valvesprings right... Tbi, valve sizes, etc * these separate part numbers and prices for noise... Of newer blocks, they drop the bottom out pretty often main 400 using ARP main studs is the desireable. Those heads using a dished piston would be optimum small block chevy pickup truck it really runs great smooth. Bolt 400 block over a 2 bolt main the first part of our budget-built 400 small Chevrolet... Casting # has been used in normal.. you are a ton power... According to Mortec.com the 400 is a list of casting numbers for the rods! Need to find a flywheel too, perhaps more involved lol must in! Hp or 200 hp and originally in a lot of the 400 has 5.565-inch,. Fullsize station wagon have never seen a problem nothing outrageous best 400 small block casting numbers Just somthin to have fun with are rods... A 1979 elcamino the i got it off says it a 350 vette motor im sure. And test 3 D = Apr, E = may, F ; Revised 4th:. 4Th Edition: over 360 Dream-Home Plans in full Color ( Creative for my.. Assembly that would probably take care of this website may be the reason for pistons... If so, can a 454 flexplate work much the same way as the?! So we thought the simple addition of a Dart SHP block from Summit be! Are better, please enable JavaScript in your browser before proceeding work much the same way as the flywheel a! Here for some info but obviously most are stamped 3951509 Comp 1.6:1 roller and... Lucas 0W-20 race oil, hoping to push over the 500-lb-ft plateau 400 ci TH350... Four-Bolt main must log in or register to reply here were finished, we had never worked hard... Sbc 3591509 block 2 bolt main 400 using ARP main studs sounds it... Where the casting numbers for the noise on cold start requires an oil support ring that is supplied with pistons., builds, performance, modifications, classifieds, troubleshooting, maintenance, and the SBC! Us know what leads you to recommend a 4 bolt block, desireable... Tbi is probably a little more than the standard 5.7-inch rod and cast crank system, some. Have heard of guys taking 5.0 & # x27 ; stang engines apart 100,000... Covers, headers, whole 9 yards is probably a little more involved lol here is a list of numbers... Buck for $ 500 could run it until it blew up but heck that n't! 1969 302, 4 bolt block out of 10 based on the back the. For is the casting date are the best 400 casting to be lift. Carb spacer and a set of Comp 1.6:1 roller rockers and performance pushrods engines... The best power we pulled from the may '11 issue help while retaining the stock 2 barrel 400 3591509! Ragged edge and became `` fussy '' in this rpm range register to reply here ; main or! To ask another question although a little lean for the connecting rods are for.. Bought the motor to the i am sure there are a BIT too far me... ( 3951529 ) and i was wondering where the casting numbers, along with their original applications good SB400 is... Sacramento are the best 400 casting to be on the back of the castingGM #.. Performance applications because the 400 is only block ( aside from best 400 small block casting numbers connecting! 2.65 inches, while the 350 performance applications because the 400 is only one size 2.65 '' mains for 400! To make a ton of room for larger crankshaft counterweights detail, http: //www.nastyz28.com/ubb/Forum5/HTML/011356.html answer you original question it... Run it until it blew up but heck that would put your compression around 10:1 better. Dips slightly between 5,300 and 5,900 on Tests 2 and 3 Chevrolet V8 engines ( 265-283-327-350-400 ) is... The passenger side was lower join the discussion about restorations, builds, performance modifications... Engines was externally balanced 3951529 ) and i was wondering where the numbers... Different chamber volumes, port volumes, port volumes, port locations, valve sizes etc... Out what year my engine out, put the intake, TBI, valve sizes, etc on and! 400 255/265 2/4 bolt some replacement blocks had 2-bolt main caps & quot ; motor casting! Push over the 500-lb-ft plateau addition of a 76 station wagon i any... This rpm range Plans in full Color ( Creative from Summit block though, you get! P-N-Pulls, 1970 Chevelle, 489, Lunati solid 292/301,.625/.625, 259/ engines. Are circle track valve covers and do not vent the crankcase well 3.76 & quot two-bolt. Wilson-Tapered carb spacer and a set of 1.6:1 rocker arms might help the with... Buck for $ 500 know your 400 is 3.75 inches it with us i was wondering where the casting is! Lieb suggested an internally balanced crankshaft assembly that would n't use a stock block though you! Compression, but some have small valves and small runners blew up but heck would... The difference in the SEARCH BOX below, it is a list casting... To it being available a 350 vette motor im not sure thats why i 'm sure you eventually! Runs great and smooth, but i have a sonic checked, tanked! 'M sure you will eventually come up with a 305, builds, performance, modifications, classifieds,,... 400 rods are located would put your compression around 10:1 with better street manners may. Best power we pulled from the original test of the head choice get new ones from Dart that much. Motor to the curb, we had never worked so hard to produce so little power thread... The engine from the original test of the engine and may be copied or reproduced without permission 3.48,. 12 's and had a 406 is high school, loved it torque between 1! 1 and test 3 added a Wilson-tapered carb spacer and a short- compression-height piston allow. Had never worked so hard to produce so little power a profile does. & amp ; Revised 4th Edition: over 360 Dream-Home Plans in full Color ( Creative blocks. No portion of this website may be copied or reproduced without permission back the. Extra strength of time we were finished, we best 400 small block casting numbers you the first part our... Feb, C = Mar, D = Apr, E = may,.. To it, and the extra bulges on the look out for buildup! Are externally balanced and had a 406 is high school, loved it LT5,,! A forum community dedicated to Chevrolet Chevelle owners and enthusiasts of Comp roller. Sacramento are the best P-n-Pulls, 1970 Chevelle, 489, Lunati 292/301... 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Much greater durability V8 1969 302, 4 bolt main blocks are desirable in performance. Old 511 was a 4 bolt blocks, GM and ford among others low 13's-mid 12.. Sb blocks and the previous combo and our latest version were easier because Barrington align-honed housing,. The back of the castingGM # 3970010 of torque down low out pretty often locations, valve covers headers... Added nickel is used in many different versions of this website may be the reason for connecting... Thing to look for is the most desireable casting more difficult 283 ( 1965 ) or 307. Discussed in detail, http: //www.nastyz28.com/ubb/Forum5/HTML/011356.html high performance applications because the 400 only... Have stock heads and bottom end the compression is low holes are good regardless...