Last spring, I bought a 65' Pass. block, 409, short block, disassembled. We got a pass. 409 oil pan with it, slightly dented up on the bottom. I am now repairing it. Is a 65' pass. oil pan different than the earlier pass. oil pans?? If so, does anyone know how to tell the difference? You see, we would like to put this engine next year, into a 60' Chevy, and it would be nice to know if it will fit the 60', before we're ready to drop the engine in place. Know what I mean??? Thanks! Brian.