Personally I would not run double belts. I would just stow the extra belts for emergency's. I just have not had good luck doing it
It took many tries at different pulleys, different mounts, finally a cut and modded power steering pump mount to get the pump closer to the block and shim/washers to move the pulley out. It used to squeal tons now only for a second or two when it's cold. My alt is located on the pass side (with total after market bracketry) I don't think i ever had a problem with that alignment it was always the PS.
Phone bush? Like a phone booth only a bush. Are you just scopeing out for KOH?