which master cylinder for 4 wheel disc...

finally got my grubby mitts on a rear disc setup off of a 95 Cherokee (thanks to FABO member Danny_Depetro) and I already have the front disc setup from a 88 5th Avenue. What master cylinder will work in my 72 Duster for this setup? Also I would really like to go power brakes (if possible). I scrounged a old Wilwood adjustable prop valve out of one of the crates o' stuff I got around. I know, I know,,, "don't know why, why would you wanna power brakes wanna wanna???". Look, after jumping out of perfectly good airplanes for 10 years my knees don't wanna push no harder than they have to!!! How bout this, what m/c do I need to stay manual and will it work if I find a booster with the bracket and stuff later down the road? If yes, great. If not, well, I'll cross that bridge when I get to it!8)