Body mods, post em!

I figured this would be a good spot for it - but I have the A body adapter to use the flip top gas cap on my dart, and was wondering if anyone's "dented" the body to recess the cap kind of like how it's supposed to be? or welded in the part from the donor car and shortened the filler neck to allow it? It was something I was thinking about before I paint my car, as a mod I'd like to do.