Just got together with ARP and came up with some studs and nuts that work to replace the factory head bolts. Allowing a little more clamping pressure and less wear and tear on the case threads. Retail is about $50 for the 4 studs with nuts and washers. Here are the ARP part number:
Stud AM6.770-1b
nut AMN12-1
washer AMW750n
Stud AM6.770-1b
nut AMN12-1
washer AMW750n