I have had a good deal of interest in the SA larger fuel tanks.  These tanks
hold 85 liters which is around 20 gallons (I think just slightly more).  The
tanks would be $300 and I would need the money in advance.  I am still
checking as to whether you will need any special mounting hardware but the
filler tube, and expansion tank setup looks the same as the stock Vanagon one.
I think there is a difference in the fuel tank filler after '85 so I also need
to find out which filler the tanks will be compatible with (maybe just best to
get a neck with the tank and tack on an extra $20 or so for it).
Let me know if you are interested and I will get you the full info as soon as
I get it.
Ken Wilford
Van-Again
John 3:16