I used a NAPA part #T42194 as the smooth pulley to take the place of the stock SC idler and moved the stock pulley down to the hole just above the alternator using a m10 x 3 1/2" bolt with a locking nut and washer. The belt goes over the stock relocated pulley and under the new NAPA pulley and wraps the sc pulley more than 3/4 of the way around.