#5046, "RE: ARP head bolts torque specs" In response to In response to 0
I have the spec sheet that came with my kit for the 420a. It recommends 85 ft./lbs. using the manufacturers tightening sequence. I used the factory torque steps up to 85 but omitted the 1/4 turn because that would have put me past 85 ft./lbs. I'm not sure about the 4g63 head, but maybe that info will help.
