Rear tire fitment with 3 inch relocate kit on 70 Dart

Would a 28x12.5x15 fit in the wheel well with a 3 inch spring relocation kit installed? Thanks (factory A body rear end)
Are you talking slicks or ET/street-quick time pro's?
Slicks are rated by tread width, et streets are rated by section width, so a 12.5 slick is a bunch wider than a 12.5 et street.