>
> Last comment.  There is another limitation...the length of the spring
perches.
>If the spring is longer than the spring perches, obviously, you have to
compress
>it to make it fit even when no weight on the van.  Same principal applies
even if
>you don't have to compress the spring, but you do shorten the distance
between the
>spring perches.  With the shorter distance (i.e. by adding a spacer to
loiwer the
>top perch), at any given point in the suspension travel, the spring will be
more
>compressed than without the spacer.
>

last last comment *s*

you're right if you are pushing against a fixed object, but you're not. If
the spring can lift the van without the spacer, it certainly can do it
equally with the spacer - the van simply rides higher (until you add enough
spacers to bottom out the suspension).

Alistair