I have an 80-84 block in my nova. I recently pulled the engine to do some performance upgrades. I bought a new oil pan since my old one was bent in a little. The new oil pan requires a thin front pan gasket. I can only find the thick ones and the parts store guys are no help. Anybody got a part number? I would prefer 1 piece rubber, but right now in not to picky, just want to get the motor in.