15x7 rims, 225/60/15 with 4.25" minimum backspace. 4.75" best, 4.5" bksp better. Watch the very front fender lip at bottom.
For rear is the car is low, same size. I have 245/60/15 on 15x7 4.25" bksp small bolt pattern on my 68 Dart it rubs the outer fender lip. car is stock ride height.
3.75 bksp on a 6" to 8" wide rims kills fender clearance.