I bled the brakes on my 78 all day, but the pedal is still soft on the first push. When I jump on them the fronts lock up, and the two of them seem even at least. So I would gather my problem is in the rears. After the first pump everything seems even. My master cylinder was just recently replaced, and the front calipers and rotors were swapped from an earlier 280. What could be causing this?
Thanks,
Gavin