>They will not level the van.  I have these installed.  They only lift 1/4"
>when inflated to the maximum rated pressure. This is on an empty '85 Westy.
>They probably help maintain that height when loaded, but do little for
>leveling purposes (side to side).  They are for improved handling when
>loaded (the van, that is).    I would highly recomend them--easy install
>and fairly cheap--but not for the Westy sag.  Sorry.
>
                                                              Jay

My experience mirrors Jay's exactly.
The airlifts I installed do not fix the sag of an unloaded '85 Westy.
Mind you, my Westy's sag is pretty small, maybe those with more
spring sag would experience more lift.

Scott
'85 Westy "Pearl"
Santa Barbara, CA