Pangle, looks good. I considered using Monstaliner Desert Sand on my Lance camper and Dodge Cummins. What I could not find was anyone that had used it on aluminum siding, or how heavy the finished product was. One other thing to think about, depending on how 'off-road' you think you will go with this beast is the extreme flexibility of this era's Ford frames, especially with a long wheel base. They flex a lot compared to Chevy and Dodge frames of the same era. So, if you are indeed going 'off-road' and get the axles twisted up enough, how many attachment points and how flexible are these connections? Pull through spring loaded? Hard mounted? It might be worth a crawl under there to see how the Ambo box is mounted to the frame. jefe
below is about the maximum twist of my axles before the frame starts to contort and put extra strain on the camper tie downs, and this is on a short bed Dodge frame that has very little deflection. The deflection you see is the camper box trying to stay with the attitude of the rear part of the frame, bed, and rear axle. The tie downs are pulling mightily right here, maybe the most I can expect and not have a stress problem. My fix was to loosen the rear tie downs to let the back, lighter end float if need be.
a link to a vid going up the Diablo Drop Off with the truck camper. Note the twisting of the axles through the mogols and the effect it has on the camper box.
https://www.dropbox.com/s/bfj5y93wsd7vfkw/jefe does sand hill at dry wash of the devil Anza.m4v?dl=0