McGaughys 2.5" Drop Spindles Uses Heavy Duty Disc Brakes C-10 2WD 63176 Chevy GMC C-10 Truck 1/2 Ton 1971 - 1972 2WD Must use heavy duty disc brakes (1 1/4" thick rotors) McGaughys Part uses Original Style Ball Joints and Tie Rods Includes: Drop Spindles with Bolt Kit