pedal is soft at the bottom

my car is 1970 2 door hard top swinger power steering and non power brakes with the complete suspension ( front disc and rear drum) and drive train out of a factory V-8 1974 swinger 2 door hard top and i don't remember now if the 74 had power brakes or not.

my car has the factory steel BBP wheels and 14 inch tire size from the 74 car. I never did anything to the brake lines nor the proportioning valve on the car so they are still 1970 stock form. I have new brake pads/calipers/rotor and wheel bearings in the front.


i know i am prob missing some important info you would need to help me. But my problem is The brakes seem to work OK at best and are super soft at the bottom.


thanks in advance Don