GP Smooth Firewall PlateCustom Firewall Plate for 1968 72 A body This panel is 18 gauge steel with a custom GP designed bead roll. It is intended to go over the existing Firewall with minimal modification (it does cover existing A C or non A C holes). Can be bolted or welded on. Recommended to use self etching primer prior to the paint of your choice. see video for install https: youtu. be pwMFpvdSIxA fits: Chevelle, El Camino, cutlass, Gto, skylark, Montecarlo, A body