I might as well throw in my 2 cents. Blast away
Bolts are made to stretch. That is what keeps them snug.
Now the stud vs bolt. I saw a guy from ARP on Shadetree Mechanic that was talking about the difference. I can't remember exactly what he said but it had something about a bolt has a stretch and a twist at the same time when it is tightened. A stud is not being twisted so it works better than a bolt.
Make sense?