Into the pad on the front passenger side of the block. In that case you might see "T0422TR 1123456789" stamped In later years, parts of the Vehicle Identification Number (V.I.N.) were also added before or after Of the alphabet to code the type of engine, transmission and vehicle into "suffix code" which in this example is "TR". Don't mistake this for a capital letter "I". In the 50's and 60's, Chevy used a Roman numeral " I " for the number " 1 " in these engineĪssembly dates. The motor was assembled at the Tonawanda factory on April 22nd. So what do we have so far in this example? The "22" standsįor the 22nd day of the month. The year, in this example "04" or the fourth month April. The next two digits stand for the month of In thisĬase the first letter "T" stands for an engine factory Tonawanda. On later model engines the engine assembly code looks similar to this "T0422TR". Which only included the last two digits of the year. Some very early smallblocks from the mid 1950 model years had an Engine Assembly Date Of the block above the timing cover mating surface on the front of the Some blocks have the engine assembly code on a flat portion You may have to move the alternator to be able to read this engineĪssembly code. Is on the passenger side of the motor, the ledge on the block deck is rightīelow it. On the passenger side of the block deck at the front. These date codes are can beįound in a number of locations on the block, but most often are found onĪ ledge that is visible when the motor is assembled. The metal as opposed to a "raised" casting. The engine assembly date is a "stamped in" code that is stamped into Join our Forums! Chevy V8 Casting Number Locations (Part 2) Engine Assembly Date / Suffix Code
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