Does anybody know what the the transmission tag should say for a 1967 gt500 with a c6 transmission. My tag reads PGA A3 on the first line.The number in the Marti tagbook for a 1967 390 car with a c6 is PGA P or PGA P1. The marti tagbook does not list a special code for a Shelby in 1967,but it does list a special code for 1968 shelbys with C6 transmissions. Thanks , Jack