1963 Valiant V200 Wagon

ok heres some thign to remember,,, check and see what the bore size of your current master is now, if you like the way it feels whe n working properly,,sounds to me like your master is leaking down a little at a time or a very small drip at some connection,, i had a braided hose come loose and had the smallest amount of fluid leaking caused the pedal to sink to the floor if the car sat with out being driven,,,

chaning the bore size of your master will make a big difference how the pedal feels,, the bigger the bore, the harder it is to push the pedal,,very noticalbe on ,manual brakes,,,the smaller the bore the more fluid it pushed quicker,,,less effort to push to get the same stopping power,, on power brakes you may not feel the difference,,