I'm sure it's not a mystery to someone on this list. My 65 turbo Corsa coupe is all stripped clean to the uni-body and it is interesting what you can find when a rotisserie is used. On the sheet metal that the engine seal matches to at the front of the compartment, upside down in the middle is a factory stamp: 1310 T02 Anyone run into this type and location mark? What does it mean? thanks, Jeff