One observation- - - - - -since there's no accumulator in the system, you'll lose power boost as soon as the engine quits, without the one power-assisted stop that's available with a vacuum-boost system. Not a problem, as long as you're aware the brake pedal will get hard immediately if the engine dies. The BIG ford rigs (2-ton and up) with that setup had an electric motor driven auxiliary pump to handle brake boost with the engine off.
Jerry