Let me know what you find, 4spd. I've got body, chassis and parts manuals on disc but from what I've searched I can't find Master cylinder details for the A body. It shows a complete view for the Imperial and another for B and E bodies but all they show for the A's then is the pedal assy. Very strange unless I'm missing something. I heard yay's and nay's regarding needing a different master with the disc brakes switch but decided to change over just to be safe. Glad I did so far considering what I found upon removing the original.