Wilwood ProSpindles 1971-1987 Chevrolet C10 / GMC C15 (2.5" drop)Wilwoods ProSpindle Kits contain a pair of Modular Spindles, steering arms and hubs assemblies for either 63 70 or 71 87 Chevrolet & GMC 2WD C10 C15 Pickups and Suburbans. Specifically designed for use with Wilwoods disc brake kits, with a 2. 50 drop for a more aggressive stance without affecting steering geometry. Constructed from a proprietary grade of forged aluminum with an integrated modular bearing hub assembly that supports both 5 x 4. 75 and 5