BROTHERS now offers a replacement firewall for your truck. Constructed of high quality steel, it is a perfect reproduction in both fit and thickness to replace your damaged or rusty original. EDP coated and ready for paint. BROTHERS now offers a replacement firewall for your truck. Constructed of high quality steel, it is a perfect reproduction in both fit and thickness to replace your damaged or rusty original. EDP coated and ready for paint. Compatible with 1967-1972 Chevrolet/GMC C/K Series Trucks Compatible with 1967-1972 Chevrolet/GMC C/K Series Trucks