[bad68bowtie]

I am by no means an expert on this, but from things I've read in the past it would be a real PITA to put a Duramax combo in one of these trucks and if you're dead set on running a diesel your best bet by far is to get a Cummins and put that in as the swap is much much easier. I have heard the option of taking the 67-72 body and putting it on a factory Duramax frame but I don't think I've actually seen that done anywhere.

Again I am no expert and don't have any direct experience doing any one of these swaps but that's just the gist I've gotten from things I've read on here and other places.