1963 Valiant V200 Wagon

thanks for the info. i have the newer 2 bolt style on it now, but i had a problem with it the last few times i drove it. where the pedal would be real soft once in a while. or even go to the floor. i wasnt loosing fluid anywhere either. i think it may be the proportioning valve since its the only thing in my brake system that isnt brand new. but to be on the safe side im going to replace both the master cylinder and prop. valve. i was just planning on going with the eastwood with the larger reservoir, and their adjustable valve.