On pan rail, left side: PK3410767 2996 5055
PK is the factory of assembly PK = Kokomo assy plant
Part number 3410767 = 1970 318 HD 727
2996 - 10,000 date code of assembly = Friday, October 10, 1969
5055 = number of transmission assembled that day till yours.
OA156366 this is the actual cars...