There is some local guys here that had a truck at our dyno event. It was an older man's grocery getter, and it had air/air cooler, then a water/icebox in thhe bed for the water to air cooler. His intake pipe was frosty after the dyno run. Iirc, it was a ford/cummins, twin cp3, compounds, etc etc. I don't recall how much power it made. But I do know it was a daily driver, and I'm sure the driver didn't keep ice in the box ALL the time.
Eisenhart diesel. Or something like that is the name of the business. Maybe you want to call them and find out specifics?