What would be the appropriate amount of backspacing for FWD? I assume it would be less than most normal RWD cars need. I bet I could fit based on the fact that my body has big fenders that flare outward at the top, unlike most FWD cars where the fender well tends to be close to flush with the wheel. My current wheels are within the top of the fender at least a inch, probably two.

They have a set of 15x4"s but I would still stick to 7"ers on the back because I would use it more as a street car.