I don't know about your wheel sizes or offsets, or which brand of tire you are considering, but back in the '70's in attempt to put more rubber to the road on my '69Z RS, I used 235/60-15 BFG Radial TAs on 8" Corvette Rallyes, and I had issues with the front.. during sharp turns they rubbed against the bolts holding the inner fender to the fender so I exhanged those bolts for rounded head allen screws, then I found the tires were scrubbing against and wearing thru the plastic covers behind the RS actuators.. so I finally took them off, and put back the 15x7 wheels. A friend had the same size tires on 7" rallyes on his car, and he had no issues, but his car wasn't an RS, and his car seemed to sit higher, as I believe the springs had been exchanged for 'BB' springs..?