I agree that you cannot eliminate torsional load but might not a stud exhibit less that a bolt?
ARP states to install the stud finger tight. No torsional load to the fastener at any point during installation. The nut would then have some torsional load while it is tightened.
A bolt, on the other hand, might have more torsional load due to the fact that it "stops" when bottomed and then when the correct torque is applied it would tend to twist more?
Just guessing here.
Cheers to you also
