should fit most full size boxes...
It fit my Dodge with just some minor trimming of the front skirt on the camper... just trimmed the wood back and folded the sheet metal skin back over the surface. These were built for the old "standard" full size pickup box.
I made some wood shims to fit between the side over hangs and my box to make it fit snug.
I can take some measurements on mine if you like...
By the way, I have a buddy who looked at the second camper you found and it needs a bit of work since the roof leaked and damaged some of the cabinets.
There are quite a few of these in the Midwest... the MSP craigs list has one listed nearly every month. You just have to know what your looking for.
I just put mine back on the truck this weekend to prep it for the ARRL field day event the end of June. Puting my ham radios in and mounting 3 different antennas in the coming weeks. I'll try and post some pictures.
Prybry