Is there anything I should do to my transmission for longevity or preventative? I'd kinda like to plan ahead for when I do my first fluid change on her.

2018 Ram 3500 longbed, 68RFE, 35" tires on 3.42 gears, 22,000 miles. Usually haul 1500 pounds in the back in the winter and a 4,400 pound truck camper in the summer.
I usually run a 90 hp tune in the winter and just the 30hp in the summer with the camper.

Does anyone know what the line pressure is set to with DRD transmission tuning?

Here's a webpage of parts I was interested in. I'm not looking to spend a ton of money here unless she gives out but I'm pretty easy on truck.
https://www.xtremediesel.com/dodge-2...-overhaul-kits

I'm fully aware of Valair Performance clutches.
http://www.valairinc.com/performance...s%20Parts.html