My 85 Westy has the same problem.  Sounds like a lot of the 2WD vans do.

deb
> From: Automatic digest processor <LISTSERV@GERRY.VANAGON.COM>
> Reply-To: Vanagon Mailing List <vanagon@gerry.vanagon.com>
> Date: Thu, 14 Jun 2001 03:41:40 -0400
> To: Recipients of vanagon digests <vanagon@GERRY.VANAGON.COM>
> Subject: vanagon Digest - 14 Jun 2001 - Special issue (#2001-745)
>
> Yea...sorry,I was referring to 2WD vans,musta missed the syncro part
> in the original post.The different position of the tank & filler neck
> obviously does creat some difficulty.
> But unless the US-bound 2WD vans had a different filler neck,which
> I guess IS remotely possible,I wonder what the problem can be?
> Mine is all original & has never given me an ounce of trouble in 9 years...