Dana 44's or bigger (8.8 ford is plenty strong for a rear axle), ARB's (If you have the dough) If not, then a Lockrite in the front, and Detroit in the back. 4.56 gears or lower. Possibly 4.88's or 5.13's if you don't drive the street all that often, you're gonna need an SYE if you don't already have one. HD SYE is recommended.
A Tom Wood's rear shaft is gonna help out a lot when it comes to strength. The front shaft I wouldn't worry about upgrading, just carry a spare.
Longarm always helps if you aren't already running them, the more flex, the better when it comes to crawling.
Winch, or some good buddies and some sturdy recovery points.
Rock sliders if you like your rocker panels...
Carry a spare tire and wheel..
Hi-lift is a must, and load up with tools before you go out.