I have to drop my Diesel tank(was 80 gas) this fall for a trip from NY
to FL and back..

think that the spare tank in the shed w/swiss cheese top would be a
good candidate for the added capacity..
I'll also be adding a 12gal tank to replace the clamshell lets see if I
can get 30 gals of range on this lil TD (25-27mpg)

Dan
Whos not afraid to beat, bend brake and weld modify a fuel tank

  Lloyd McClelland <lsm6@NORTHCOAST.COM>
Subject: Re: re-shaping vanagon gas tank for more capacity

I was thinking about the same thing a year ago when I noticed some
epoxy on
the OG 57 Beetle tank bottom, ground it off and found it was like
Swiss
cheese . I took it to a local radiator shop, they dipped the tank, cut
out
the bad section welded up with new metal then coated the inside. I
then
painted it . Then I started thinking about the Vanagon tank...notice
thinking/not doing :)   Chris- so let us know what you find.. how much
additional fuel it would hold and how much $$$