Bill, I’m a bit confused. My rear bumper is 56″ and my front is “52. I like the 52 better but the 56 is probably more correct. The 56 is ever so slightly wider than the body (rear fenders). 60” sounds too wide????
I have been under the impression that our kits are mostly a bit wider than the originals. My front bumper is 52 inches wide (and looks a hair too narrow, since the front track is a couple inches wider than that). The back–hard to measure on the car–looks to be about 55 1/2 inches, and is about right.