What about clearance?
I am running into some of the similar problems: Former mech bent the tightening bolt, bracket, etc...
But the issue that I have-which I cannot figure out-is clearance: I took the entire adjusting bolt OUT-and still do not have enough movement to get the damn belts on!
I have a '82 300 SD, with AC. I have gotten the runaround from the local auto parts stores as to the correct size, anyway. Any hints?