Based on your time frame, and starting condition, I would build it in this order
1. air compressor/recovery gear/tow hooks front and rear.
3. rock sliders, solid front/rear bumpers
7. either dual cases or single 4:7s, you can always find traction by stacking rocks, being able go as slow as possible is the best way of keeping your sheet metal dent free. Will require doing drivelines twice, but by the time you SAS it, the drivelines will likely need to be rebuilt anyways
5. lift larger tires, 33's or 35's
6. re-gear w/4.88's or 5.29's, depending on what tire you upgraded to, look for used diffs with/w/o lockers, you can usually find them for $2-500
2. rear locker if not found w/gears, bench labor is cheap
4.winch, could also be done earlier depending on what deals you find
8.sas if/when you find it is time to risk damaging your show room clean rig on the trails you are now wanting to run, upgrade to 35's if still on 33's
10. longfields/marjoints should be done at the same time as the SAS, the oem ones are now 27yrs old, 32 by the your time frame
9. front locker
