Disc brakes were not an option on the front of a Ford Bronco until the 75 model year, and they were never offered from the factory on the rear of a Bronco. Our Death Proof Bronco came with four-wheel drums that were adequate with the dinky stock tires, but after adding 35-inch Pit Bull Rockers we had to anticipate which way the Bronco was going to pull every time we hit the brakes, and stopping distances were on par with a loaded semi-truck. We added front disc brakes using factory parts, and they provided a vast improvement. Fast-forward to 2014. We have bumped our tire size up to 37-inch Pit Bull Rockers on 17-inch Allied Rock 8 beadlock rims, and all of a sudden our brakes seem marginal again.