Rear suspension system with up to 6" drop for 63-72 C10 trucks. Includes adjustable tubular truck arms, double adjustable shocks, high travel springs, C-notch bracket, panhard bar, and brace bar. QA1's C10 bolt-on rear suspension system is designed to convert trucks originally equipped with a coil-spring rear suspension to coil-overs. This system offers up to 6" of total drop and integrates adjustability into multiple areas so you can truly fine-tune the geometry to create the perfect performance after lowering.