I’d think about an aftermarket oil cooler up by the grille. The oe ones like that aren’t very efficient
The factory oil cooler seems to do a pretty decent job. One of the early EcoDiesel hot shots/transporters had an aftermarket oil cooler, but everyone else is running the factory oil cooler with no concerns (everyone is tuned), and two of them are nearing 450,000 miles on their engines.
Green Diesel Engineering offers a lower temperature thermostat that reduces coolant and oil temps approximately 18*F. So, that would be an option, too.
Now that I have the grille swapped out, plus the GDE tune, I'm feeling pretty comfortable with my current setup. The EcoDiesel already has a working oil temp sensor, so I don't need to add a sensor. I might add an oil by-pass kit and/or deep oil pan at some point, but that would be more for fun/experimental than anything.
What grade of stainless fasteners did you use? 316N or 304N? 348 would be pretty nifty if you can get your hands on them, but even 302 would work. Did you add a backing plate to help disperse the load better?
I used the screws that came with the kit, so I'm not sure which grade. The kit comes with a backing plate (pictured below). The tie-down is tested to 5,000 lb minimum breaking strength in a vertical pull test. I opted for the pear shaped ring instead of the round ring.