I didnt notice any difference in power either. I used the power steer parts from a 93 XJ
All i needed was the pump,steer box,remote reservoir ,and hoses. I hooked the box to my stock pitman arm and my truck already had the pump bracket i just had to unbolt the idler from it and put the pump in its place.
The steer shafts are also different but either will work,my manual one was solid and the power one has a rubber joint in it.
only took about an hour and made a huge difference,i can now turn my 33X12.5s with one finger