The springs are not really designed for the added weight that is present with
the Westy.  They will work on a Westy or Syncro but the ride will be harsher.

I have the springs on my Wolfsburg.  The ride is good.  The cornering is a
lot better (Not that I go flying around curves, but NOW I do not have to slow
down to keep from FEELING that I will flip the van).  On some larger bumps,
the right rear is bottoming out some.

One other negative note is that the van has to be lifted by the jack to get
the spare tire out (205x70x14).

Adding @500 lb. of cargo (Plus me up front) did not cause the rear to drop.

Over all I like the effect of the springs.

Robert