I have a 4th gen rear differential on my 87 camaro. They are a little wider than the 3'rd gen's. So the tires stick out a little past the fender. I've seen some import cars bolt on a little fender flare that makes the body wider.

Do they make those for 3'rd gens?

 

https://www.thirdgen.org/forums/body...wide-body.html

 

If you only want the fenders flared out another inch you would be better off having a real body shop weld you on some fender flares. As an aside the type of body shop that would do this is rarely if ever called "(insert name of city here) collision" or "(insert name of city here) frame and body."

 

Well the whole reason I want to do this is because when I accelerate hard the fender scrapes the rear fenders when it squats. So I would cut the old fenders and bolt/ weld the new ones on.

 

You could get a better pair of shocks so it doesn't square so hard... I'm running flared fenders and a custom made set of shocks