repost, no answers last time...

I'm trying to help my friend pull the entire "kitchen" out of an early 80's air cooled ASI/Riviera vanagon camper.

Everything seems loose except the darn furnace doesn't want to come out and it seems to be holding the cabinetry in place.

Has anyone pulled the furnace out of one of these vehicles?  What is the trick?  Are there any hidden fasteners?

It appears the exhaust part of the furnace is separate from the burner and should separate, but they don't want to...

Photos here:

http://tinyurl.com/7y6ua