My Poor Truck . . .

I love that Bullet Proof website. I think I'll get one of their EGR coolers next time.
The overhead creeper for working on tall vehicles they sell is a great idea. A bit pricey, though.
On the oil cooler:
Air is much worse than water for carrying heat away. They seem to make up for it by making it much larger. I would prefer a combined solution, the way transmissions are cooled. Run the oil line through the radiator first, then through a smaller air cooled cooler. There's already four radiators in the front of these trucks. A/C, engine coolant, turbo intercooler, and transmission oil cooler.