I've got a 91 XJ 4.0 HP d44 up front out of a camper special (4 piston calipers) with a ff60 out back disc conversion(front calipers out of an 80 K20) What master cylinder should I run. I'm thinkin its gonna have to push more fluid than the stock master since stock are single pistons and rear drums. Anybody runnin this setup? what are you runnin?

68-69 corvette master cylinder from the parts stores are pretty cheap. It's the standard answer for power brakes.