E-lockers, in addition to finding complete and operational lockers, you have to poach all the circuitry and goodies that go along with it. And I cannot remember when I had my diffs off my troopie, but you may have to modify the axle housings to fit the E-locker housings. You will definitely have to replace a few of the studs to longer ones as the carrier is a little different.
Air lockers, no modifications to the axle housings, but add the compressor and air lines. Possibility of getting mousture in the system and failing, a few instances of the carriers failing, but few and far between.
Search around a bit in the 80 series section, thats where the bulk of E-locker threads will be. Tons of E versus Air threads.
For gears, if you are doing a rebuild, then you have the chance to change gear ratios up or down.
I added the TJM Pro Lockers to my troopie, got them at a better price point than the ARBs at the time. Hopefully I can get the troopie back on the road and try them out
