That does look good.
I was thinking 1.5-2 tons with the wider front fenders for the conversion with a box. The pickups would just be an engine/trans swap with a different rear axle. How difficult would it be to put a 2.5-3" plug in the fender along the mounting flange to widen it? Just looking, it looks fairly straight forward.
What are you using for power in your one ton and how does it perform?