Swapping to diesel?

[Overdrive]

Has anybody successfully installed a diesel in one of these trucks? Doesn't matter which engine... the more ideas, the better (GM 6.2, 6.5, Duramax, Cummins 3.9, 5.9... you get the idea).

I'm just trying to see if it would be simple enough to do, and if anybody has gone through the trouble of doing such a swap (or has any idea of how to do some of these, like a 6.2 conversion). The poor mileage from the stock smallblock (1981 305) in my '72 is making me sick.