It is easy to add one or two hundred pounds with a steel front bumper and winch. I was able to keep the additional weight down at about 70 lb using the Arcus bumper and HF 12k winch with synthetic rope. Even so, the front end is a little lower and bottoms out somewhat easier.
before I got the Tazer, I made a couple steel tongues shaped like the buckle ends. Plugging one of them in resulted in no chiming because the Jeep thought it was a seat belt.
I like both Cavfab and MotoBilt steel diff covers--they are moderately priced, very strong, and easily drilled and tapped for 1/8 npt drain plugs. I also like the PPE trans pan and use it. All three brands come with strong replacement mounting bolts.
I got the Arcus bumper and permanently mounted my HF 12k winch. If I carried it in the bed until needed, it might be a big challenge to wrestle it into place when needed. If hung on the front, the weight out there would tend to overwhelm the front suspension while four wheeling in rough...
Some of the Mojave upgrades would be difficult/expensive/almost impossible to add to another version of the JT. (The last being the frame upgrades). Adding a front locker to the Mojave is relatively easy and has been documented on this forum, if you need it. Ronny Dahl has youtube videos on...
I have never needed a front locker, but occasionally have used the rear locker on my Mojave. I like the seats, suspension, 2.72 low, iron knuckles of the Mojave.
I feel that choices 2 and 3 are both good. Mud tires generally need more rotations than the Falken AT3w that I have. I just use a 4 tire rotation pattern anyway. However, I bought a set of take off Mojave wheels so my spare matches, even though it lives under the Jeep all its life (hopefully).
I prefer the Rock Hard attachments to the body an body mounting bolts. The frame's strength comes from its box shape not the material thickness, so I feel that mounting the rock sliders to the frame could distort the frame if they are really used on rocks.
I think that extreme heating of the bolts, torque to turn them against red loctite, etc. can weaken them enough that they can fail, as ShadowsPapa found. I don't try to reuse them, but replace them with grade 12.9 Allen heads and thick hardened washers. I choose the lengths and washer...
I got the stock bolts off on two JT's by just smoothly turning with a long handled ratchet. I replaced with grade 12.9 Allen bolts and carefully picked the lengths so their shorter span of threads was where I needed them. I put high pressure chassis grease on the threads to avoid any future...