Read EVERY post in the “what did you do to your HMMWV today?”
Hold out for a 6.5L GEP engine.
If you have no intention of cruising on the interstate, the venerable TH300 turbo 3 speed is good enough, IF it’s running through a 242 model transfer case.
There’s more, much more, but read the posts.
Don’t buy the first truck that catches your eye.
And post pictures.
Norm