Mine is a manual brake car. I bought a factory upgrade 11" kit, and put on a power brake master cylinder. They work really well, even without the adjustable valve for the rear. It was a manual disk brake upgrade kit, using factory replacement parts, and a factory replacement master cylinder, just for a power brake system. Bolted right up to the firewall, just without the booster. Makes the peddle a little stiff, but it's all good!