Use ARP or stock head bolts. Use head studs and you will blow head gaskets. If you insist on head studs, turn the dia. between the threads down to 7/16" and they will work. Cometic gaskets and 13.5 to 1 will work fine. The eng. in my Demon has 1800+ passes and still the same head gaskets, with 13 to 1 CR. Stock block, no fill and center 3 caps are Pro-gram 2-bolt caps. Crank and pistons have never been removed from the 1973 360 block, for all 1800+ passes. Car runs high 9s and a best of 9.68, on 110 oct. gas, at 3050 lbs. with a crank trigger and 28* timing. Also a flat tappet cam and production cast iron cyl. heads. Build a good sm. block and you will never need to switch to a big block.