Every new car today has power brakes. But that wasn't the case in the 1960s when most Mustangs came with non-power four-wheel drums. But even with old-style drums, you can add power-assist with Master Power's conversion kit. The Master Power kit includes a compact 9-inch power booster with dual master cylinder, vacuum hose, and a 90-degree vacuum fitting. Also included is a longer brake pedal, which achieves the same level of mechanical advantage as a stock Ford power brake pedal. Everything needed to get the job done is included except brake fluid.