How high can I torque my head studs to try to keep from pushing out gaskets, etc? Merlin Iron block. Dart Aluminum heads. ARP studs. 7/16ths diameter. .081" thick copper gaskets. Block o-ringed. Heads grooved. Dart says 70 ft-lbs. ARP says 80 ft-lbs. World Products doesn't say. I'd like to go as high as possible without over-fatiguing anything.