We opted for inexpensive pinion brake kits from USA 6x6 for the front and rear axles of our J-truck. These brakes can be mounted on the front or backside of the axles and even clocked for suspension, frame, engine and steering clearance. The compact caliper-mounting bracket bolts to the pinion flange. We needed to grind the bracket a little to get all four holes to line up properly. You may also want to upgrade to slightly longer bolts to get full thread contact. While you have the yoke removed, it's a good idea to replace the pinion seals. USA 6x6 sells these, too.