To me it sounds like you need to take a step back and eliminate other possibilities.
Remove the brake line from the master and plug the hole. If you don't have a plug, cut an old brake line an inch or so beyond the fitting and crimp the line over.
once plugged, a couple of quick pumps will clear any air bubble. Now feel the pedal, it should have a short throw to be solid.
If it isn't right, take a piece of string and tie the brake to the steering wheel at full height. Now go look at the linkage. The pushrod should be no more than 1/4 " off the face of the piston in the master. If not, fix the linkage.
I believe there should be an additional pedal return spring from the pedal to the frame or body to return the pedal all the way up.
