I didn't read that head gasket post but that's a pretty easy subject. I did learn a little trick years ago. When a head bolt or stud nut is torqued pressure is applied directly under the hardened washer. If you CAREFULLY before final clean-up of the heads flip it over and either by hand or a champering tool put a 1/8 champher under EACH head bolt hole. Doing this spreads the pressure more evenly across the head surface while torquing a head down. If you look carefully at a head that came off a build you will see a raised area around the bolt holes preventing proper compression of the head gasket. This prevents that from happening. I learned this from a NASCAR guy.