I'll be doing the exact same thing this winter. I have lockers (Detriot rear and aussie front), trusses, a rebuild kit for both axles and a 4.10 gearset for my D44....just need to grab a free weekend and a 4.10 D30 gearset for the front. Also have all the tools. It's not a bad process, the first axle will take you a bit longer than the second, I recommend getting an old engine stand and Summit Racing's axle holder for engine stands as a workbench. Also bleepingjeep's pinion holding tool is fantastic and works well with a short piece of pipe and the axle holder.
Best part is, you can sell all the tools afterwards to someone else who wants to do their gears if you're only doing the one.
Each axle needs:
Master rebuild kit
New gearset (thick)
-or- New gearset and carrier
-or New gearset and Locker (some types like Detroit, helical gear, and e-lockers replace the carrier completely)
3-4 qts of Gear Oil
Personally, I won't get rid of my D44 rear. It's unique for a Comanche, it's stronger than any other bolt-in option, plus there's more aftermarket parts for it than any other axle you'll ever stuff under there except maybe a GM 10 bolt.
If you don't have plans for Xmas I'll be down here doing one axle then the other