Brake question.... Master Cylinder question to be exact.
In my Brake Manual, Disc MC have bigger pistons due to larger pistons on the calibers and factory cars use Power assist due to higher leg pressure required. Pedal ratios make a big difference along with dash and underhood room being a big issue to. So that being said, if you a making a manual disc brake setup, use a big MC piston 1-1 1/8" with the outlets on the fender side. That keeps it away from exhaust heat better. Use a higher pedal ratio, steel braided hoses. I converter my 82 Merc Zephyr from power to manual brakes. Already was disc. With the 460 in it, I wanted brakes that worked with or without the engine running. I prefered the manual due to better feel and control. Rotor size is a issue also. This is why you see theese 13" rotors, heat and clamping power. 13" will stop you easier the 10". But then bigger rims are required also. 11" rotor, 1 1/8" MC, steel hoses. She'll come to a stop fast.