Tires size
Well here is what my son has on his 72 Dart. The rear tires are 245/60-15's on a 6.5" ralley wheels with a 4.25" offset and they fit nice and dont rub on turns in the stock wheelwells. You wont fit much bigger tire in the stock wheelwell without it rubbing on turns. The front tires are 205/70-14's and they also fit good. Ron