I'm looking to get some advice on head gaskets. I've been trying to just use gray RTV as my head gasket and I've blown it out twice now so it's clear I need a better solution. In theory, is using a metal head gasket less likely to blow? Its hard for me to image no head gasket being leak proof. I've read that for that you want to lap the mating surfaces to a very fine polish. I have also heard that using a combination of a metal gasket and RTV is the best.
I think I'll get some varying answers but whats the best way to prevent it from blowing out?
PS- assume that the head is being torqued to 12ftlbs in a cross pattern.