396 casting numbers, We were one of the first to seek out horsepower codes, then casting numbers. Many have followed suit and have produced a number of different reference manuals. I've also provide photos of casting numbers on the block and other assorted areas. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. These codes reveal the engine’s specs, production date, and original vehicle. Here are our personal big-block head and block casting number lists. Jan 7, 2024 · Where can I find the casting number and casting date location? Thanks. This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. Do not know bore. Feb 18, 2026 · 396/402 3999290 The GM casting number 3999290 identifies a Big Block Chevrolet (BBC) engine block produced for the 1970–1972 model years. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. )Has 3917215 Heads Has Flywheel and clutch. Transmission is an M21 manual with new clutch and pressure plate. Sep 19, 2013 · Check out this quick reference of Chevy V8 block-casting numbers. Oct 19, 2024 · To identify a Chevy 396 engine, check the casting number, suffix code, block date, and partial VIN. The casting date of the block should be on the passenger side near the freeze plug located not far from the starter. The block casting number on small block and big block Chevy V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. The 3902406 casting number on the 396 cid engine block was a 1967 only model year casting although some late 1966 models may have used it as well. Apr 11, 2015 · Open vs. Beginning in 1970, big-block Chevrolet heads use a tapered-seat spark plug which eliminated the washer to make the seal although some early 1970 castings continued to use the longer reach "N" reach spark plug. All items in the photos will go with the motor Such as: -396 Chevy Big Block (Block Casting Number: 3955272 date of 04/68. Engine Block - Group 0. I am trying to figure out what year the block is and what is it, 396 or a 402? Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Stamped on Pad T0228EF 18K17445 (Code for 68 Chevelle 396 350 HP 4 speed. . Good used 1968 396 Long Block Casting # 3935440 Dated B-20-8. We feel it is extremely accurate and is as exact as we can make it. 033 The 1967 Chevelle V8 engines were the last year to use the canister type oil filer. " - Ronald Reagan. “If we ever forget that we are One Nation Under God, then we will be a nation gone under. The 1967 Chevelle 396 engine was the first 396 to NOT have an oil groove in the rear camshaft journal. Bookmark this quick reference guide and check back as needed. Jun 3, 2021 · The casting number on the back of the engine on top of the bell housing flange is 3969854.


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