Sounds like you will have to do a lot of work to make these fit. What I would do is cut the bumper in half, then with help, place both halves on the side of the body. Bolt them to the body, and see how much of a gap you have where you cut the bumper. Once you have the bumper the way you like it, use 1" flat stock aluminum, and fiberglass them in about a foot or so past eash side of the split. Use as many flat stock pieces as you like on the inside of the bumper. Once this dries fill in the gap with fiberglass, and smooth it all out. I think this should do, but it's a lot of work! Anyone have any better ideas?