174/177 supercharged small block, where to start?

Running an 1190 belt with 2.5 top and 6" bottom pulley I had to shorten the threaded rod a bit to clear the belt and i keep a nylock nut at the very end just incase. I Also assemble the tensioner the way the other fella describes. It worked out i can swap top pulleys to 3 1/2" and longer belt and keep the tensioner in the same mount holes.
Hope you get it sorted, throwing the belt can't be fun.