It should be around an 84.5. I don't mean to to sound condescending, but did you reroute the belt? From the alternator, the belt should go under the crank first. If you go over the water pump first(stock belt setup), it will rub on the idler. From the idler going counterclockwise, the belt should go over the alt, under the crank, over the water pump, under the p/s, and over the a/c back to the idler.
