Yeah, vans and heavy equipment is where most people get them to swap. Never came in a truck. I always had hope that one would end up in a Jeep or Dakota because of the Chrysler/Cummins relationship. There was one at SEMA a number of years back. Was a TJ with Dana 60s and the 4BT. All built by the SRT and MOPAR divisions, too. I nearly lost my bladder, didn't want to leave it! All looked so perfect, factory installed and clean as can be.
Also, the 4BT shares nearly all of its architecture with the 6BT. That means it wouldn't take much to convert over to a common rail by using the 6BT blue prints.