Three thoughts - 
One, righto on the spare tire ......that might even be worth a quarter inch
'down'
Two..........you drove or rolled the van to settle the suspension, right ?
you know that when you put it back on the ground, until it's rolled a couple
van lengths at least, the suspension won't be settled.
Three..........technically, you could/should always have a simulated
driver's weight in it, like a sack of concrete on the driver's seat to
simulate the driver's weight, as it will always at least have that extra
weight in it.  
91's don't usually have a problem being high in the front.
Shimming rear springs slightly is easy too. 
Scott 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Allan Streib
Sent: Tuesday, January 08, 2008 6:17 AM
To: vanagon@GERRY.VANAGON.COM
Subject: rear end drooping

OK -- after a brief holiday hiatus and a few other distractions, I
finally finished the installation of the new steering rack, strut rod
bushings, ball joints, and tie rods.  Now, with the van down off the
stands and the proper Hankoook RA08 tires all around, it's become
apparent that the rear of the van sits just slightly lower than the
front.  If I put a level on the rain gutter over the side door I see
about 1/8 bubble inclined towards the front.  This is with no
occupants or cargo in the van.

This was not apparent when first I got the van because there were
undersized tires on the front, while the rears were about the right
diameter (but not the correct load rating).

Is this normal?  Common?  Correctable?

Ah-ha, as I'm writing this I just remembered I have not put the spare
tire up in its recess under the front -- that will probably help a
little bit.

Allan
--
1991 Vanagon GL