My buddy's 85 300 Turbodiesel had that problem too. It had the orginal rotors on it, car has 125k miles. The front rotors were beyond shot. I replaced both front rotors and installed new pads all the way around. I used OEM pads made by Pagid. Bled system and no more problem.

If yours are hanging up enough for the rotors to glow red you have more of a problem than his car had.