I was running American Racing 200S's on my '72 RR until recently (the car's apart now for resto.) 15x8's (unknown backspacing, and I'm not at home now to measure them) with 245/50-15 BFG Comp TAs. Same size on all four corners. The fronts did not rub at all, although they were very close to the lower rear of the front fenders. The rears fit easily, but they didn't really fill the wheel wells to my satisfaction. The replacements will be 17x8s in front with 245/45-17s and rears are TBD, but most likely 17x9.5s with 275-295/40-45s. Whatever gives just a slightly taller sidewall than the fronts.

Good luck in your quest. Sorry no pics.