What do you know about the weight of the bodies, traction, tow/ haul capacity? Seem like a lot of ambulances are F350. Some diesel, some gas.
A local fence/ gate builder told me that he spent his best money on a $6K-ish surplus vehicle that was outfitted with a stand-in body, equiped with lights, 110v, tool storage compartments.
I thought a service body would work well for me, but the storage is too limited, Full wrap handle-bars and mounted bars are too big for the side boxes. Hauls a mini, and can hold chips/ wood in a custom (aka homemade) milled wood box.
I wonder how it would be to anchor a mini in an ambulance. My armchair guess, the floor would probably need to be reinforced at the back end, for loading.