Search for build sheets. It is the sheet that was with the car with all the codes for every item that was put on the car. All of them had codes for not only standard features (such as the vinyl floor covering for Tempests and T-37's or if carpet was ordered for that specific car it had a different code. Engine, disc brakes, a/c, optional equipment all had codes. They told the assembly plant what was supposed to go on the car.
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