Note: This kit is designed compatible for Chevy trucks 63-72 that have been lowered more than 3\'\'in the rear. It will mount the shocks at the correct angle allowing for more shock travel. Applications： Compatible for Chevy C10, C20 1963-1972 Compatible for GMC 1000, 1000 Series, C15/C1500 Pickup 1963-1972 Note: Will not work with leaf spring suspensions. Package includes: Upper and Lower Shock Mounts All hardware Feature： Ideal for lowered trucks Improves shock angle for better handling. Note： - Professional Installation Is Always Highly Recommended