Hope this helps you. The block # you have is wrong. This info is from MORTEC and nastyz28.
BLOCK CASTING NUMBER 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. This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. Some of the later model blocks have the casting number on the passenger side of this ledge. The number itself can have 6, 7 or 8 numeral digits. They might look like this "361959" or "3970010" or "14015445". The block casting numbers do not have any letters in them. There are sometimes individual letters found on blocks like "GM" or "CFD" for the Central Foundry Division, but they are not part of the block casting number. Also some of the later blocks have the size of the motor shown in liters. You may see a "5.0" (305) or "5.7" (350) cast on the rear ledge of a smallblock or a "7.4" on the side of a big block 454. On the side of some later blocks the last three digits of the block casting number are cast into the block, but these are difficult to see when the engine is in a vehicle. http://www.mortec.com/location.htm Engine Code Stamping Numbers All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. V8 codes are stamped on a pad just forward of the right side (passenger) cylinder head. 6 cylinder engines are stamped on the passenger side of the block behind the distributor. Click here for Chevy Engine Code Listings The engine date must precede the car build date, otherwise something is amiss. Some engine machining operations (decking) will obliterate the engine ID. Engine ID Code Example: V0101CLJ - (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code) Another example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400) Code Engine Plant Code Engine Plant F Flint (Motor) S Saginaw Service H Hydramatic T Tonawanda K St. Catherines, Ontario V Flint (Engine) (McKinnon Industries Canada) M GM of Mexico From: William Piper To: 'The Chevelle Mailing List' Sent: Sunday, September 16, 2007 8:58 PM Subject: [Chevelle-list] Decoding the engine All, Members of the Chevelle list, I purchased a Chevy this week and would like a little help decoding the engine. The gentlemen I bought the car from said he didn't have any idea. I'm not sure I got the numbers right and will double check them tomorrow in the daylight and a little more scrubbing on the block. Front engine boss has two sets of numbers VO507UFO and T6F526006 (I'm guessing this number is part of the VIN). The casting number retrieved from the back of the block on the pass side is N088551. This number doesn't seem to match anything I have in my data base but it appears to be the only cast number on the back of the block. Thanks for your help on this as I need to determine what I have before I can determine what to do with it. Tom
