Knox, you're entirely right about the Cummins being a better motor, and a true medium duty engine at that. I just wanted to use a GM product to simplifiy the adaptation. I probably will just keep the smallblock anyway, and drive it until it blows up. I dont think they started calling the GM diesel "duramax" until 2001 or so, that's when the new 6.6 liter engine designed with Isuzu first came out. The old motors didn't really have a name, but if they did it would probably be "powersmoke" or "Clattermaster"
