For 1964-'72 Chevy Midsize, 1967-'79 Chevy Camaro, 1968-'74 Chevy Nova, 1965-'76 Chevy Fullsize, 1978-'87 G-Body, & 1956-'76 Caddy. This steering box incorporates late model steering technology with a 14:1 ratio and all NEW components. These boxes bolt directly onto your frame without any need for additional brackets or adapters. NOTE - The 500 series uses a 3/4"-30 coupler and all power boxes use inverted flare hoses.