Ive got a torch red Cobra and am lookin to purchase wheels. The FR500s have me hooked, black with a polished lip. However Im tryin to find out what the offsets are to be to make the wheels flush with the fenders in the front and back. Id like to run 10.5 in the rear and 9 in the front. If anyone knows what the offsets would have to be to accomplish this id greatly appriciate it. Thanks in advance.