3" Rear Drop Kit Lowering Blocks U-Bolts Fit for Chevy C10 Pickup 1963-1972 63221190Description: A simple and practical way to reduce the height of the rear for C10 or C20 truck without affecting the driving quality. These lowering kits are specially made for Chevy 1960 1972 and for GMC C 10 C 20 2WD trucks equipped with factory rear coil springs. Pickup truck rear lowering blocks allow you to customize your ride, provide a lowered stance and boost handling performance Located between the axle housing and the rear lower trailing arm,