my point was that a single v-belt doesn't offer the 'traction' to turn a CS130 charging at full tilt.. i've got mine about as tight as I dare go, and I can see it polishing the belt. one day when I when the lotto, or collect the ransom on Bin Laden (lol) i want to get a march pulley system that uses all poly-v belts, I don't want to go true serp.
GM alternator bracket is basicly the same.. pivot at the bottom, top bolt just slides thru a slot.. put tension on the belt, tighten the bolts down. my buddy has a chrome bracket and his alternator is ALWAYS loosening up because of the chrome