I run both a 275/60 and a 28 X 9 slick on my 69 Dart. The wheels are 15 X 8 with a 5.5" bs with the springs moved in 3/4" and the rear end moved back 1/2". I also had to trim the wheel well lips on both sides. The M/T ET Street Radials only have about 1/4" clearence on both sides and some times rub the springs.