You got my vote, I like diesel engines but for a Jeep a cummins 4 popper is to heavy for the power it puts out.
I would rather use a 5cyl Mercedes engine or the new engine they use in the Dodge sprinter that thing is light revs well has good torque and lots of power the biggest challenge is finding one and come up with a bellhousing.
I love the cummins 6bt and ISB engines but anything less than a 6cyl from them would be a waste of time and effort