you can get the loaner tools from autozone or other local parts store. if it is 4WD, you will need to unbolt steering gear from frame, if 2WD, not needed. long steering rod is called center link if memory serves, and that stays on truck connected to tie rods unless those are being replaced as well. one tip is to push up that "seal" on bottom of steering box where pitman arm attaches to box. the puller might not fit on there if you don't do this. and the pitman SHOULD have a master spline so you don't have to worry too much about getting it back on right. as for just replacing the "ball joints" in idler and pitman, it might could be done, but the whole arms don't cost that much(mass produced due to the problem you are now having), and would be easier to replace whole thing. as for upper and lower ball joints though, if control arm bushings are in good shape, would just replace joints. the large aluminum cylinder u refer to, is that mounted to the frame? i usually replace entire assembly just to be safe, but this is a matter of opinion. this job should be able to be done in a few hours, just take your time to do it right and should be pretty easy....some grunting aside. best of luck, and let is know how it went.