The Ford 4.0 is almost assuredly going to be a fuck of a lot heavier than a GV 2.5L or XL7 2.7L 
while I will admit, i don't know for sure the weight of the 4.0, it is in the same engine family as the ford 2.8, and I know the ford 2.8 weighs in at 305lbs. that really isn't to bad for a v6. i have no idea what a 2.5 or 2.7 weighs, but i would be interested in facts instead opionions from people who really don't have a clue and have to use profanity to get their point across.
couple of pictures:

trany to tcase jackshaft, that is a short shaft c4 and a stock zuki tcase.

installation is pretty straight forward. need to make all the mounts, and bolt it in. widen the trany tunnell. install an electric fuel pump, take the wiring harness out of the doner vehicall, and splice, what i believe was a about 3-4 wires. it is pretty self explanintory once you start working on it.
the swap is really pretty cheap, no expensive parts needed, everthing can be found in the junk yard. i would love to have a suzuki v6 in my samurai, but i can only imagine the cost of the motor alone would make it expensive. i have been able to find wrecked exlporers/rangers that run good for less than $500. also save a bit of money because with a v6 you don't need to run crazey low gearing(which ever v6 you use).
i have run the ford 2.8 for 3+ years and used all stock gearing and 33x12.50 swampers. i am a mudder though, and not a rock crawler(no rocks in iowa).