Tim:  I've just snagged some excellent instructions for r&r of the 2wd vanagon fuel tank and posted them to my site.
They can be found at
www.weidefamily.net/vanagon/
Go to the Misc Section / Tips & Tales / and see "R&R of the Vanagon Gas Tank - April, 2005" in the Tips Section.

thanks,
Brent

Subject: Replacing a gas tank

How difficult is it to replace a gas tank on a 90 Vanagon 2WD?

Brent Weide
Portland, Oregon
http://www.weidefamily.net/vanagon/