G BODY GP SMOOTH FIRE WALL PLATEFITS : 80S G BODYS MONTECARLO , CUTASS, EL CAMINO, REGAL, GRAND NATIONAL, MALIBU, PONTIAC GRAND PRIX, GRAND LEMANS, AND THE PONTIAC BONNEVILLE. This panel is 18 gauge steel with a custom GP designed blank plate or bead roll option also available for additional $50. 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