In a message dated 2/9/2015 2:03:23 P.M. Eastern Standard Time,
jpalmer@mymts.net writes:

Walk  through area is carpeted. Separate carpet behind the vent after the
elevation  change (in the "living area").

sounds like the walkthru floor sheetmetal is different on the vanagons
which had gas heaters installed, sounds like they used aircooled vanagon
walkthru sheetmetal there from the factory..  very interesting.. would love  to
see a pic  when you get van out of storage.