serpentine belt on 1996 Chevrolet Corvette

replacing serpentine belt,,took old off ,new one and checked for size its the correct one ,,pulled tensioner back all the way wont slip over alternator by 1/2" routed correctly checked that ,,so close but not close enough to put on

Asked by for the 1996 Chevrolet Corvette
Wrong belt size
couldnt get old belt on either,,,same to short