1970 chevelle vin decode9/3/2023 ![]() ![]() See all 44 photos 44 photos A prefix code that designated gear ratio and determined whether the rear-axle assembly was equipped with a limited-slip or an open-style carrier was stamped on the righthand-side axletube facing forward. In order for a 1970 Chevelle SS to be appropriately deemed Numbers Matching, it must meet all of the following requirements: the casting number of the engine block must be correct for the car in question the casting date and assembly date of engine must precede the assembly date of the car generally by two weeks or more (this is to allow for shipping from Tonawanda, New York, to the various assembly plants) the VIN sequence must match the assembly plant's procedures with the location of the stamp as well as the appropriate font for the assembly plant in question and the last six digits of the VIN sequence must match the last six digits of the car's VIN. This is the stamp that is used to signify "Numbers Matching" and is very important. The stamp 10A100454 indicates the following: 1=Chevrolet Motor Division 0=1970 A= Atlanta, Georgia, assembly plant 100454 is the last six digits of the vehicle's VIN. ![]() The final assembly plant of the car in question will determine which of these two locations it will most likely appear. It was for warranty purposes and both the front engine pad and the vertical pad directly above the oil filter were used for this stamp. This stamp was done at the final assembly plant and not at the engine plant. The 10A100454 stamp is what is known as a VIN sequence number. It is common for engines to be either cast and built on the same day or more than four months later. Notice the block was cast on the 12th and built on the 16th. The stamping T0916CTW indicates the following: T= Tonawanda, New York, engine plant 0916 = September 16 assembly date and CTW indicating RPO 元4 engine and RPO M40 transmission. See all 44 photos 44 photos The date the engine was assembled, the cubic-inch displacement, and the transmission designation was stamped on the front right-hand side of the engine directly in front of the right-side cylinder head. ![]()
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