Upgrade to a 00-01 Durango master cylinder. Its a bolt in swap that requires no remaking of lines or fabbing a push rod. I'm using one on my TJ with ford dual piston 1 ton front calipers with chevy 3/4 ton rear calipers with a stock proportioning valve and have great brakes.
hmmm... I didnt think my brakes were that bad, but I may have to try that.
Did you reuse the reservoir or did you get the durango one with the reservoir