The 4BT might be a good little motor at that. It's about 800 lbs. though. Forget the bigger 5.9L, those are a heavy cram job in a Dodge truck, and they're so heavy the ride sucks. You wouldn't want that much weight in the front end of your off-roading Jeep. Jeese, why stop there... cram in a C7 Cat while you're at it.

Getting your hands on an export-to-Europe 3.0L CRD would be the cats a$$.