Overview This booster and master cylinder set will bolt to your trucks firewall, and convert your trucks brake system to power. Our IMPROVED set comes completely assembled. Set includes: bracket, booster, dual master cylinder, mounting hardware, proportioning valve (when applicable) and detailed instructions. These parts are tailored for front disc brakes and rear drum brakes. Compatible with 1973-1987 Chevrolet/GMC C/K Series Truck Features Power brake conversion master cylinder and brake booster Mounts on the firewall in the stock location Includes: firewall bracket with dual reservoir master cylinder, 9-inch brake booster, proportioning valve, and lines These parts are tailored for a front disc and rear drum brake system This conversion kit uses the stock brake pedal and features a new pushrod assembly