i have a 50 pu with a 350/350. I put a dual master cyl in the stock location with no power boost for the must2 disc brake set up. it does take more pedal effort than my 39 Pontiac coupe with a sub frame and power disc brake set up, but its ok. I don't think my 110 lb wife would stop it very easily though. (if I ever let her drive it. HA)
Roy