This Pro Coil System and Control Arm kit is specifically designed for the 1963-1987 Chevy and 1963-1986 GMC C10 platform, Comes with your choice of QA1's proven single (paired compression & rebound) or double (individual compression & rebound) adjustable coil-over shocks so you can change the valving to meet your specific needs, Shocks allow for ride height adjustability and are 100% dyno tested and serialized, Feautres Control Arms made of 12 gauge HSLA steel tubing for increased strength & a powder coated finish for added corrosion resistance and protection, Compatible with popular drop spindles, which will provide even more drop when used with this system while adding up to 7 degrees of caster for more stability - allowing for optimum camber adjustment in a lowered truck.