The power steering pumps are in deferent locations on the 2.5 and 4.0L. Also if you don't have air conditioning it would be alot easier to mount. Anyways, the bracket is not hard but the clutches can be expensive. I am just going to turn my AC compressor into an air compressor because the AC is pretty useless in my jeep (it is fun to turn on just because I have it though)
Anways, I scored a great deal on my Regulator. It is not adjustable pressure but I picked it up used at some welding supply around BCS for $15.