VW mounted different Spring into different kind of Vanagons.
During my seach of parts to be used for enlarging the total
allowed weight I found out, that springs from Panelwagon and
Bus are different. Additionally I heard, that springs used for
US Vangons are different, too, for a more smooth riding. I have
no idea about Westy springs. A guess is, that Westy springs
are those from the Panelwagon.

To enlage the maximum total weight of a Bus to 2.6 tons you
have to change the rear springs to those of the Panelwagon,
as well as some other modifications. To enlarge the maximum
total weight of a Panelwagon to 2.6 tons you have to change
front spings to some others, from which I don't know the source,
maybe those from a Crewcab (and other modifications).

Helmut
'80 Vanagaudi