> is the vanagon gas tank compatible from '80-'91

The filler neck changed around '85, so you'd have to swap the neck and other
parts if you put a later tank in an earlier Vanagon or visa-versa.
(Obligitory sp*m:  I have new tanks for $180, for any year.)

- Ron Salmon
 The Bus Depot
 http://www.busdepot.com