A pinion brake would be a rock anchor. As mentioned look at a driveline brake on the t-case output or a disc setup with emergency brake. We are planning on doing a retrofit of a new disc setup like Nick mentioned onto an old 14 bolt soon. Looks pretty straight forward.
A forum community dedicated to GMC and Chevy full size owners and enthusiasts. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more!