Nice work Fox! Really enjoy the updates. You motivated me to learn how to fabricate/refurbish used box pieces into a complete box for my 3/4 ton.
I have a question for you on how you mounted or fabricated your fender extensions. Are they c-shaped in cross section so you can bolt to box and to the original fenders? and do they have cross supports?
What I am doing is mounting 1ton fenders or panel fenders to my box since i have them. They are much narrower than normal fenders and need extensions/spacers. If you have any pictures from underneath how you mounted them that would be helpful to me.