[64k10burb]

It looks like you were right on a few counts Areotruk. It has holes for the aux heater, and it has 4 holes in the center of the roof for possible light of some sort. It also has had a vent cut into the roof sometime before it was painted blue. Here are a few pix of said items, plus strange mirror, rubber hose pieces under truck, and with new tires and wheels........