Hey,
step by step!
The outer of the cab looks like a lot of work.
The canvas needs to be a new one (old ones are expensive as new ones useually).
The gunmount on the dash is intended for a UZI MP.
The gun mounts in the body are for the G3 intended.
The inside boby photos make the impression that only the radios are missing, the other electric seems to be complete (however, is it still in working order?)
The photo of the backside if the stool tells me, that this Mog at least for some time was used at the ABC Abwehrkompanie 110 in Emden which is in northern Germany.
The Schwingfeuerheizgeraet probably is unusealble, need to be replaced by a better one or best would be by an unused from the Depot. Rebuilding these is somewhat dangerous for with a leaky burner co will enter the body.
Anyway, a lot of work before this rig can bee used for a MV meeting.
I would not remove the body from the Mog except for restauration.There are enough possibilities the modify it for a camper body and keep a good part of its original function alive.
The trailer air brake system supplys, if working propperly, 6.3 bar filling pressure for the trailer (red coupler )and a maximum of 6.3 bar brake pressure on the yellow coupler. US trailers do not realy fit for this!
Mogs are tough, never perfect, however somehow always running.
Good luck!
Wolf
P.S.: Which are the options never seen before. May be I can help.