okay after figuring out the oil filter leak i realize that i can hear a header gasket leak.. well i think, i have victor jr stage 3 heads bbk LT's with copper gaskets, well i hear the leak driver side last cylinder but i can feel air what seams to be coming out of the spark plug well?? my buddy says its just the gasket leaking in that area but i feel different. if it was a cylinder leak what else would it do and if not just a header leak should i stay w/ copper or get like some fel-pro's???