Mine is a 66 chevy, been having a lot of trouble getting the oil pan to stop leaking. I have replaced the front mail seal (chevy 350) put new taming chain cover w/gaskets and a new oil pan with rubber 1 piece gasket and i still have a small leak in the front of the oil pan at center. I am going nuts. The 1 piece i got is kind of thick are thier different ones. Should i have gotten a thinner one? Thanks in advance for and insight.