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

If you go to the link I provided it has that dimension as well.
Jim separated the driver cabin from the "box"/passenger cabin dimensions.

bob

On Dec 11, 2013, at 12:39 PM, Tom Buese <tantonbz@gmail.com> wrote:

201 cf in 1980 vanagon w/ rear & middle seat removed according to vanagon.com-but does that include the front of the cab & Westy poptop volumes? I doubt it.

YMMV,

Mr. BZ