[Fat Charlie]

Hilbilly armor made the suspensions cry, but it was the powertrains that really suffered.

That much added weight (in the OP) to protect... tires? Really- adding armor made people think of those puny little trucks as tanks. The old Toyota pickup with a machine gun mounted on a post in the back is a much better weapons platform in that environment because you can't armor a vehicle enough to matter and still call it a vehicle.