It looks like there are only 4 tires and rims, so you would have to carry 2 spares or spend a ton of $$ to buy 2 more for the front.
Also they would change the overall gear ratio about 10% in the wrong direction
2x Yes, on fan shroud and factory fan and clutch.
I pulled a 5x8 cargo trailer over 10,000ft passes in 95 degree weather, running the A/C with the factory cooling setup
If you must use an electric fan, use it as an aux pusher in front of the radiator.
Just what you need to satisfy your urges. For only 25x (50x, 100x?) the cost of Odyssey 4x4 Toyota rebuild, you too can 4wd.
https://bringatrailer.com/listing/2017-ford-f-550-earthroamer-xv-lts/
Hwy to the Sun limits are 21ft long and 8 ft wide. Don't know if mirrors count, they do count going through the Zion NP tunnels. I had to rotate my west coast mirrors to reduce the MH width 2" to not have to pay the escort fee
Long ago and far far away, I had a VW Rabbit diesel. After 15 years of ownership I had a Crown Royal bag with a bunch of shims. After I sold the car, I put the bag on an E-bay auction, the final bid was outrageous. Keep your used shims in an old oil can, maybe someday they might be worth a couple cases of beer😁