1963-1970 Chevy and GMC; Pickup Suburban Blazer and Jimmy 2-1/2-Inch Works with 67-70 ball joints and outer tie rods. DROP SPINDLE SET Make your truck disc brake compatible with a set of our disc brake spindles. Convert your C-10 to 5 or 6 lug disc brakes with C-10 conversion spindles. Cast from the highest quality Ductile Iron with 4140 Chrom-moly CNC machined pins. Accepts factory ball joints and tie rod ends. Designed to use OE style 1971-87 1-1/4" rotors, calipers and bearings.