Im seriously thinking about swapping in a diesel engine in my 73 K20 after the 350 goes or maybe even before. Ive never heard of anyone doing it though. I dont know how much exactly there is to the process. And I dont know how much it will cost to revive a used diesel to put in. I guess a 6.2 is what im looking for since it came in the 80's trucks which were about the same as mine. Can anyone help me out with anything on this?