wj booster swap for 91 mj

Hey guys couple questions.On a 91 mj I am about to do this swap,I have already done this on my xj.I am using rear discks from a zj got the prop valve also.uestions are 1.looks like the mj uses all of the connections on the prop valve any issues with the zj valve?Also have been reading about a height sensing valve?Is it needed?will it cause any problems with rear discks?
This is my first mj so sorry about the noob questions,found lots of swap threads but not much concerning the prop valve and sensing valve.Thanks guys

On my 92 MJ, I've got Explorer rear disc brakes, WJ booster, 4-wheel disc ZJ prop valve, and removed the load sensing valve. Works pretty well.