HELP with master cylinder 4 wheel disc

Looking through this thread trying to find answers for my build as well. Maybe you guys can see if I'm headed in the right direction. 72 Duster non/power drum originally. Converting to disc off of 77 Aspen up front with rear mounted calipers. Using a shortened 8.8 rear off of a 94 Explorer disc set up in the rear... plan on getting the MC setup from Dr. Diff http://www.doctordiff.com/aluminum-master-cylinder-kit.html and the adjustable proportioning valve from them as well http://www.doctordiff.com/adjustable-proportioning-valve.html --- I'm planning on running all new lines and flex lines since most of my originals have had some damage, Do I need to ditch the stock prop/dist valve or can it be used as a distribution block and then just put the adjustable in line to the rear? Do I need to get a different dist block instead? Staying with Non-power MC.