I'm ready to put a set of large valve Aluminum heads on my cast iron SBC. I know lot's of you guys have some pretty strong preferences when it comes to gasket suppliers. I want to know who has the best head gaskets for the best sealing and not prone to problems. Thickness isn't too much of a consideration as far as I'm concerned. This isn't a high performance build that going to see race action. This is going in a 57 chevy pickup for daily driver type use....OK, maybe an occasional street race . Let's hear lots of opinions here.