Did you roll the rear fenders ? My rims are 15x10 - 4" back space . I have just under 1" tire to frame clearance right now , so with a fender roll , notch , mini tub & narrowing I should be able to tuck them in . The 12 bolt & 9" are about the same price , pro's & con's , which is better ? I don't plan on putting a bar in the car right now , so I probably won't be going to the track much more once I get the boot , just a fast street car for now .