First, that likely DID NOT HAVE disk brakes, and most certainly not 4 wheel disk. So for starters ARE YOU CERTAIN that it has disk at all (front) and that the rear are also ??
If so, next, make certain the bleeder screws are at the top of the calipers. It is common to reverse the spindles to put the calipers to the rear of the spindle, and so you must swap the calipers side to side to get the bleeders "up."
Next if you find you actually have rear DRUM brakes, adjust them up tight and then re-bleed, see if the pedal improves, then back off the brakes untill you can turn the wheels. The brakes WILL drag some until seated.
