I'm looking to install power steering into my stock 93 22RE IFS 4WD which is currently manual, so I need a complete system. There's a guy local to me parting out an 88 22RE RWD with power steering that I was hoping to pull for my truck. I looked up some part numbers and none of them are the same, this has me wondering which, if any parts can be swapped to my truck. I assume the pitman arm is incompatible, but what about the gearbox, and the rest of the system? I'd prefer to pull an entire system from a donor truck rather than piecemeal it, but if I can pull the system from this 88 RWD and only need a part or two that would be OK. My truck already has an unused crankshaft pulley so I'm thinking it can be used.

BTW, I tried searching without any luck. Since we like pictures, here's my engine bay:

 

Box is different. The parts that I know of that are compatible between 2wd and 4x4 is the pump and bracket, the crank pulley, and reservoir. Not sure about the hoses and lines or the steering shaft.