A buddy of mine is working on a '70 Mach1 and is trying to figure out if the wheel/tire combo he wants will fit under stock wheel wells. He's looking at 235/60R15 on 7" wheels on the front and 275/60R15 on 8" wheels out back. I think he's planning on old school Crager SS wheels but not sure what backspacing he's thinking. Can anybody tell me if these will fit without rubbing? Thanks!