1973 Dart brake failiure

Bewy said
Post #7. Unless you just filled that front chamber, where did ALL that fluid come from? Internal leakage inside the m/c. Fluid being pumped from rear chamber into the front chamber because of leaking/damaged seals.

I haven't filled it yet, I thought they were supposed to be thay full, I can try pumping it with the cover off and look and see if it fills the other side more I suppose. Also if the parking brake is only for the rear brakes that might explain both of my issues, my rear brakes might just not work