ford 9" on 1967 firebird
i have a manual brake 4 wheel drum 1967 firebird. The car has a 9" ford rearend out of an unknown car. The car was bought this way. At some point the rear driver's side wheel cylinder began to leak. The brake pedal went to the floor after the fluid in the master cylinder got too low. I refilled the master cylinder with fluid and bought shoes and a brake spring and cable kit out of a 1967 mustang. I began bleeding the the brakes with the master cylinder lid off but the master was full of fluid. I used speed bleeder bleeder valves which are supposed to allow the bleeder screw to remain a quarter to a half turn loose and i guess a ball bearing keeps air from coming back into the line when the pedal is released. I have bled the brakes for about 15 minutes and now neither of my back brakes are building enough pressure to stop the wheel while the car is idling on the jack stands. About half way through bleeding, fluid began to shoot out of the front chamber of the master cylinder so i put the cap back on and continued. The front brakes have been untouched. I am wondering if the master cylinder is damaged from the vigorous pumping of bleeding and am wondering if there is a pressure difference needed to actuate the drums of a ford as apposed to the original gm brakes. The brake fluid is barely dripping out of the right rear wheel cylinder while being bled.