This ball joint conversion kit swaps out your original spindles with 64-72 Chevelle spindles, 67-69 Camaro spindles, or 68-74 Nova Spindles. You will need to save or find 5 lug steering knuckle arms off a 64-67 Nova, to complete your spindle swap. The kit provides new ball joint housings that weld into your stock control arms, the ball joints press into the welded housings. The ball joint supplied in the kit are performance ball joint with the correct taper for the spindle. Finally you may need to drill out your steering knuckle arms to ½” from 7/16”.