Well this is perfect timing. I literally just 5 min ago fixed why I had to pull the engine completely out of the car, oversize oil pan so no room for anything in the car. The one piece gasket I bought for something like $30 or $35 fit horrible, I didn't have the experience to know how bad it was even though it was obvious, I thought it would tighten up and seal, it's expensive right? NO, I had to cut off about a half inch around the front corners and fill with RTV, then the rear was so ill fitting I completely cut it out and went with black rtv instead! Now I have a Kevco oil 6 quart oil pan but I don't think it is the issue because it lines up with the block, it was definitely the one piece gasket.