explorer 8.8 in an a-body: experience needed

Supershafts I was thinking of those who have used factory a-body master with explorer disc and thought it worked well as is. If the factory master is not applying proper force to rear calipers, but in return the rear is factory designed to brake harder, they might kind of balance each other out. I personally do not want to trail and error my brake system to find out if it works in a panic situation. So if putting a disc explorer diff in, how would you figure out what master cylinder would work with factory front disc/ explorer rear disc? Would 2# RV on rear be adequate to hold pads to rotor without causing excess drag? Thanks for all the info, greatly appreciated.