You probably can use the info here to find almost any information about any
year/model vanagon made for U.S. consumption:
http://www.vanagon.com/info/years/passenger-vans.htm
Here's what's posted for an '80 vanagon:
http://www.vanagon.com/info/years/1980/index.htm#1980_vanagon

Bob

Hi all
Got a Question that some might be able to answer.

How many Cubed Feet in a Vanagon Interior.

trying to figure O2 depletion in a Air tight space. Of course the
vanagon camper is not air tight with the top stock canvas uninsulated.

But if you Light a candle in a air tight space of say 1 foot cube.
How long till it burns out?

Of course multiply that by the cubed feet in a vanagon and then take
into consideration occupants using O2 as well.

Any Idea?

doing an experiment. For the super cold weather for heat and
insulating on my Vanagon for a Thermal project. More of an Off Grid
Survival type question, With No Power to push a heater or shore
power, So No 12 Volt power as well. Worse case enviroment with worse
case scenario.

All in good fun!!

Jonce