|Our 6-lug disc brake kit contains all you'll need to put modern
discs on your stock 1/2 ton spindles, and uses your stock hub. The 1-1/4"
thick, 12" rotor uses a GM full-floating caliper. The 8" single
diaphragm booster master cylinder and proportioning valve mounts in the
stock location. We recommend that you upgrade the stock ball bearings to
tapered roller bearings when using this kit. Some stock wheels may rub the
calipe, it may be necessary to use a spacer. May not work with some stock
wheels. Also, 1947-50 trucks may need to drill out lower spindle hole from
7/16" to 1/2". Note: Frame mount brake boosters may require #CP9424
transmission mount. *Shown with optional upgraded rotors.