Is there a differnce between a Demon and a Duster inner fender metal splash shield. I bought a pait and rather than having the small captured nut down near the bottom, The one I bought used has a bump out of about 1" which has the captured nut in the surface of the bump out. Seller said it was for a 70-71 Duster/Demon, but my Demon piece does not have the 1" bump out? It is just flat with a small captured nut about 6" up from the bottom??