Replacing the bushings must not be to hard as I was able to do it with basic hand tools & a bench vice...Two ways to go, I used the polyurethane from Energy Suspensions. These use the existing metal sleeve from which you must remove the old rubber.. takes some doing, a little penetrating spray seemed to help quite a bit. The other is to go back with OE style rubber, such as Moog sells, & you must cut the old metal sleeve out & press the new in, I've never done this so can't speak to the difficulty.
Power steering boxes come out easy enough, many here have gone with Firm Feel or Steer & Gear & get their box rebuilt with firmer feel, not more responsive unless you opt for the T/A pitman & idler arm but I've read this is not worth the extra expense .....Most say the firmer the better though......Ultimate solution is a new K-frame with rack & pinion so it $eem$.