This retrofit column is specifically designed to fit your rack and pinion system for your 1967-72 Chevy Truck and does NOT require modification to your original vehicle to install. Install your new column in place of the old using your original dash mount and floor mount. With an adaptor, add an aftermarket wheel and the gripping surface of the new wheel will be in the same location as the original. Column comes standard with 8-position tilt, self-canceling turn signals, 4-way flashers, knobs and levers, 3 7/8" wiring plug, wiring harness adaptor and a 3/4" 36 lower shaft.