There's already been a ton of good advice in this thread but I'll add the only anecdote I can.
I was a handler for a Yukon Quest musher in 2018. That involved a few thousand miles of driving and living in the F150 while temps ranged between -50f and prob not above 0f at any time. The truck bed...
One picture? Should really add many more. Interior, undercarriage, and engine bay are what most will ask for.
Also, if you aren't on Mud, listing this there would prob help.
Ih8mud.com
I don't watch the 100 section on mud so no idea if you've posted there but I'd def throw it up if you haven't.
Here's a link:
https://forum.ih8mud.com/forums/uzj100-lx470.329/
Hah! This thing is awesome!
Right around when I turned 16 my parents bought a 97 Sienna. I couldn't sell them on the 80 series cruiser (took me almost 15 years but I have one now).
Anyway, minivan jokes aside that thing was pretty great for everything except serious offroading.
Cool build and...
This is pretty cool! (No affiliation).
https://www.expeditionportal.com/forum/threads/custom-built-overlander-4x4-ford-f600-1979-cummins-allison-no-smog.210603/
I'm far, far from an expert but I've been told and have read a couple places that the source's for Lithium (and thus the batteries) is kinda like the diamond world. There isn't a shortage but it's hoarded to keep prices high. So it's not so much that the tech isn't there but rather it can't be...