Hi KTMRider. I think I'm going to try to rebuild that awning window.
Yes, that's a 12v AC unit up top. The van is a 2000 7.3 Quigley EB50. It has been a California truck its whole life.
When I got the van it already had some 21st C upgrades - LiPos, solar, etc and I've done some additional work - the biggest improvement being fitting the updated front suspension setup that is referenced on this forum. It's now pretty decent to drive on and off road.
Changing-out the 90's-style billet grille to a stock utility Econoline front end with LED lighting (generic 5x7 headlamps and Hella Black Magic spots) was a huge improvement, too - now I can see at night, and the correct, factory grille allows a heap more airflow over the AC condenser, which is important where I live!
In my six months of ownership it has been from Southern California up to Washington and back. Right now it is in Idaho on a ski trip. My wife and boy love camping in it and the van has allowed us to stay in places that very few people will ever get to even see. It's simply a magic experience and really don't think there's a better way to travel the Western United States.