So I took a picture of the data plate
Not sure of the bolt pattern yet. it was latter in the evening and by the time I got home it was dark. Not to worried as I will be trading in my Expy for a Jeep Grand Diesel this fall. So I will probably change the lug pattern to match the Jeep.
The height of the sides are 16" I may raise it a bit. I do want a locking top so I may just incorporate the extra height into the top, not sure yet. Since it has a handbrake I need to see if I can install electric brakes which shouldn't be a problem. I do see a lose cable which I need to follow to see where it goes. I plan on installing nerf bars along the sides as well as adding a box upfront for the battery and solar charging as I already have a 70 watt foldable panel. Needs paint so that is in the future.