I am pretty positive that the mounting points for the Wolfsburg rear seat and
your stock '84 rear bench are different.  You would have to weld in new
mounting points, but it really isn't that big of a deal.

Just FYI, I have a brown velour rear bench seat/bed from a '84 Wolfsburg
Westfalia.  Full width, newly recovered, and it will actually bolt right in
with no welding required (the seat mounting setup is simpler).  Asking $100
if anyone is interested.

Thanks,
Ken Wilford
http://www.vanagain.com
John 3:16
Phone: (856)-765-1583
Shop:   (856)-327-0027
Fax:     (856)-327-2242