i have the same set up i did 15x8 255 60 15 in the rear but in the front i have the later big bolt disc brakes i went with 15x6 255 60 15 4.50 back spacing i use to have 15x8 but god damn no power steering was hard to turn. the later disc stick out the tires 3/4 on each side 4.25 was not enough for me