I am trailoring the car down to get a vortech supercharger kit put on and ran the list of mods already on the car to the installer, but he told me I need to put the stock drive pullies back on the car. i currently have an underdrive set on now. If anyone has a stock set laying around I'd take them off your hands or swap you the underdrive ones for the stock ones... The UD set are C.A.M I can take pictures of them on the car they are aluminum blue. Thanks