What pump are you running? stock?East Coast Gear Supply has a Trail Gear kit with everything you'll need for just over $200. Picked up their kit with the larger ram for my ZJ on 60's and 39.5's.
Thanks, I did run across this write up not too long ago. I appreciate it!Use a stock pump from 4 cyl TJ with external mounted reservoir. Drill the high pressure port out from 1/4" to 3/16". Pump is done. Next you'll drill and tap your stock box with 1/4"NPT holes for the hydro lines to screw into. Definately use a 1.5x8" ram. (surplus center online is your friend) but know that most Dana 44's only have about 6.5" of knuckle throw and never rely on the knuckle bump stops to stop a 1200 psi ram. The rest is mounting.
I wrote this a few years back. http://www.offroadsc.com/showthread.php?835-185-hydro-assist-thread-(revisited)