You have a number of brake choices when building a custom axle or upgrading an old one. You can upgrade your existing equipment's components, or you can completely replace them. You can use retrofit pieces made to adapt an existing design to your application, or you can step up to a custom brake kit.
We've tried upgrading with factory-style stuff, and we've tried retrofitting existing brake kits where they were never meant to be. And nothing's really given us the impressive performance that a complete custom brake kit gives. One of the most important aspects of an aftermarket brake kit for a daily driver is being able to mimic the stock system's capabilities. There are many high-quality rear disc-brake kits on the market with no parking-brake provisions, but for our prerunner/daily driver, we needed a kit like Wilwood's Dynalite Pro Series rear-parking-brake kit with a drum brake inside the hat of the disc rotor. Keeping the parking brake/emergency brake feature of our stock braking system is integral for everyday driving and always a comforting backup plan as well.