Complete Conversion Kit: Front wheel kit includes forged spindles, 12″ diameter rotors, GM large single-bore calipers with pads, caliper brackets and backing plates for a full upgrade., Premium Components: Comes with brake hoses, banjo bolts with crush washers, grease seals, bearings and dust caps—everything needed to get your project ready to install., Vehicle Compatibility: Designed for classic 1963-1970 Chevy truck applications and engineered to work with 5×5″ bolt pattern wheels 15″ or larger., Improved Stopping Balance: Large single-bore calipers and vented rotor design help deliver consistent, reliable stopping output for daily driving or restored vintage builds., Easy Fitment Notes: Will not work on stock 15″ steel wheels before 1971; compatible with most 15″ rally wheels and later.