I just finished writing an article that describes how to disassemble the combination brake valve that was used after January 1, 1970 for vehicles equipped with front disk and rear drum brakes. Here's a link to the article:
http://www.musclecarresearch.com/1970-76-mopar-combo-valve-autopsyI'd appreciate any insights, additions, or corrections to make the article more useful. I'd especially like to know if anyone has ever found a small spring at the bottom of the pressure differential portion of the valve.
