This booster and master cylinder set will bolt to your Trucks firewall. Easily converts your Trucks brake system to power. Our improved set comes completely assembled. Set includes: bracket, 8 dual diaphragm booster, dual master cylinder, clutch master cylinder, all mounting hardware, proportioning valve (when applicable) and detailed instructions. Kits are available for drum and drum, disc and drum, and disc and disc applications. Can be used with manual transmissions with hydraulic clutch only. Note: drum brake setup does not use a proportioning valve 1960-87 power brake booster comparison