I think the hardest part of a body lift is dealing with rust issues...the other things are fairly easy as long as the mounts are not rusted...but you will probably have to replace all the hardware including the bolts...which should be Grade 8.
Lifting the cab one side or end at a time requires a fairly serious jack, hoist, or even a forklift...it is not heavy (600 or so lbs) but you certainly want it stable. I removed my cab the first time (not for lift) with a forklift and it was much easier that way...recently removed the cab with a hoist and this had to be the best way of all, as long as you are just plunking it down on the same frame...only problem with complete lifting is the steering, parking brake, motor ground wire and battery cables, and a few others must be either removed or slackened.
I've seen it done with just a jack and did my rear mounts this way myself.
Oil everything as good as you can...the back two mounts are held on by the bottom nut/washer and are fairly easy...clean up the threads with a wire brush and soak them in PB Blaster or similar...the fronts may be reversed (nut on top) depending on the year. A good air gun or impact drill will help...
The bed requires a T-55 socket but you may want to try a Johnson bar (long bar) to break the rust...bolts may snap if rusty so soak the C-nuts from underneath as much as possible in PBB and let them sit overnight...and have replacements in case they are too rusted.
I just removed a box from a 92 and the bolts and clips were good enough to use again with a bit of cleaning...