weiand 671 blower belt issue
we are working on a 1937 chevy truck with a highly modified 350 with a weiand 671 blower. problem is no matter what we do with the idler/ tensioner pulley the belt goes forward on the pulleys until it is stopped by the shoulder of the idler pulley. it acts like if we let it that it would walk all the way off the pulleys,,,,, any ideas what the problem could be ????