I saw some pics of a diesel powered decco burb from one of the car shows. It has been done. As soon as you mention the "D" word one name pops in mind, and that would be Grigg Mullens, a member here that is doing, or has done a diesel swap in one of his stovebolts.

I wonder if that cummins turbo diesel would drop under that hood. Might be able to get one pretty reasonble out of a wrecked dodge, may even get the NV4500 with it.