Being a '71 never had power steering, you are dealing with that being added. So I know you are not dealing with all stock parts. Well you are dealing with stock parts, just from unknown sources.
Before you get too crazy, double check your fan clearance. Broncos and 3-groove crank pulleys are not generally good together. That might just add another fly to the soup.
As far as belts go, they run in a single plane. While you can often get a belt on that isn't lining up, the pulleys being offset, it will eat belts if not just downright throw the belt at bad times. Hard to really know looking for a 3D problem in a 2D photo taken at an angle. If you stand directly in line with the belt (where you don't want to be if the belt get tossed) how do all the pulleys line up?
FYI, when I added power steering I ended up having to move the alternator forward for the belt to line up forward of the power steering. Right or wrong, that was how it was done. Actually I cheated, I had a double groove alternator pulley and put the belt on the forward groove. I think it still took a washer to do the final shimming/aligning. But I was also working with 80's brackets.
