I'm a 6.7 owner at the moment, but have owned many 12 valves and a 5.9 common rail. I have to say that the most fun to drive Cummins I ever drove was a 24v with a NV5600. It was awesome, but had been an Oregon logging truck so was pretty beat. I'd bet you could drive around town with 10 gallons of water in the box and not lose a drop! Too many hard miles with hoe buckets in the back I guess. Love where your truck is headed!
Off topic but is the "La Providencia" taco truck still there by the feed store on the north side of Tillamook? They make some of the best pastor tacos I've had north of the Mexican border!
Looks good! Dumb question, what's the aluminum piece labeled "5W" with the cable hanging off its rear?
Also, may wanna do something about that road-draft tube hanging from your timing gears cover. Given enough time it will make an oily mess on that side of the engine, run it thru a catch can or something to reduce the self-undercoating effect. Working on oily messy engines is the devil, even more so when there's an actual oil leak you're trying to locate... Thumbs up for NOT painting the engine black, that's another horrible idea on a diesel (yet it somehow never sank in with some engine rebuilders).