Hmmm....VERY interesting! Sure wish I had a bunch of close-up pics. It does appear to be in mostly original condition, save for that cobbled rear lift cylinder system, which I feel sure was owner modified. The hood is much deeper than any other JB I've seen on the front sides where it hinges on the grill tower. Plus the front attachment points & angled frame appear original, but much different from production models. This one appears to also have a Kohler engine, which was never used on production models as any of us know and throttle lever in the dash, with nothing in the 3 slots in the right fender box, where normally there is a lift, throttle, and hydro control levers. Also, notice how much longer the grille tower is than the other. It also looks like the steering drag link goes to the right front spindle, and I believe all mine go to the left spindle. Doug, did ya get the owner's contact info?????????
I kinda think this IS an experimental model, but wish there was a way to find out more!
Easiest way to tell between JBI & JBII is the JBI has 6 bolt rear hubs, and JBII has 5. Tail lights on the "exp" are just aftermarket.