Our 1973-87 Chevy and GMC truck Modular disc brake UPGRADEkit with Wilwood calipers are high quality yet budget priced! You will get all items needed to upgradeyour vintage truck at the wheel. Our 1973-87 Chevy and GMC truck disc brake upgradekits have great features including stock height or 2.5″ drop spindles, 5 X 5″ bolt pattern rotors and spindles that fit your original ball joints and tie rod ends. These disc brake systems not only upgrade your truck, they utilize GMlate model steering geometry and feature 1.250″ heavy duty rotors. Great for 81-87 GM light duty trucks wanting to convert to heavy duty brakes.