Diesel engine swaps

Well I guess I'm wrong about that but they're still incredibly loud, unrefined engines with tons of vibration and a limited RPM range. And they still weigh about as much as a big block if not more.

I'm not against using a more modern diesel out of a car, there are standalone ECUs available for a lot of the electronic controlled diesels from Mercedes.

12v cummins is a truck engine; i'll eventually be putting one in my 1972 D200 but no way i'll put one in a car that's supposed to be a comfy quiet cruiser to eat up the miles. Also don't feel like having to re-engineer the front end to handle the weight of an 1100-lb engine.

I don't know what a C body front clip measures at the front K frame mounting points, but a Dodge pickup frame is 38-1/2 inches wide across the rails. I would be looking at the possibility of the front of a Cummins D250 frame section with suspension at this kind of weight and some 16 inch eight lug wheels with the Dodge hubcaps, front and rear, and a Dana 61 with 3.08 or the like gears.

The 4BT weighs about the same as a Gen II hemi., roughly 780 pounds. the 6BT does weigh just under 1100. As for vibrations, have you ever driven a vehicle with one? Factory or Swapped? Limited RPM Range? They can rev to 4,000 but with the torque and power, you don't need 8k RPMs to rev too. My truck hit 120 in a 1/4 at 8600 lbs.