Steve, since you're running a turbo diesel with a swillion lb's of boost, you run the risk of shoving that into the cooling system via a head gasket failure. What ever you do, allow for that scenario.
Good thinking. For this year, I'm staying with a conventional radiator in front (no water-to-water heat exchanger in the bed). That may come later, but I need to be careful with allocating my time at this point.
So far, on the 2 occasions where I have lost control of where the swillion pounds of boost are going, it has only resulted in blowing all the oil out of the crankcase, a couple of melted pistons, 2 ruined cylinder heads, a ruined turbo, and a bunch of other expensive stuff that I've blanked out of my mind.