My 81 has plastic vents.

One interior that I have seen only on an air cooled Vanagon is what was
termed the "Basic Camper"- it had  full width rear seat and small seat
against the driver's side wall adjacent to the rear seat that formed an L
shaped seating arangement in the back.  The seat has storage underneath -
think cabinet with pad on top and back rest.  It has an ice box instead
of the fridge, a sink, a slightly bigger water tank but no stove.

I like this interior, while the side seat that butts against the rear
seat make the rear bench effectively a two person seat, like in the full
Westy (De Luxe Camper"), it would offer a full size "couch" to sprawl out
on. That's the feature I would like!  I'd also prefer the ice box to the
fridge - I'd guess I'd miss the stove.

This would be good interior for any one converting a hardtop van to a
camper, since you wouldn't be cooking inside.  Also would be good for
Syncro's - no propane tank under the vechicle!

John R