These brackets are designed to bolt on any 1963-1972 C10, Suburban, Blazer, Step Van, Panel. anything that was built on GM's light truck platform with the coil spring front and rear suspension! The rear brackets bolt directly in place of the factory coil springs, and fit either 6" or 7" air bags (Air Lift Dominator D2600/D2500, Slam Specialties RE7/RE6, Firestone 224C/255C, etc.).