that means that the front wheels are tilted inward or outward by turning a large bolt that runs through the  inner bushings on the upper A-arm .
  It's mounted eccentrically where the bushings are ..
moving the a-arm inward or outward as you twist the long bolt that goes through those bushings. 

clear enough ? 
  ----- Original Message ----- 
  From: Michael Sullivan 
  To: Scott Daniel - Turbovans 
  Cc: vanagon@gerry.vanagon.com 
  Sent: Monday, June 28, 2010 7:56 PM
  Subject: Re: While replacing steering rack.....

  <Did they know about camber adjustment via the eccentrically mounted upper
  A-arm inner long bolt ?>

  err...what does that mean?

  --from Always Sunny in PA--"Illiterate..what does that even mean?"
  Michael in San Antonio
  91GL Weekender AT 2.1L 'Gringo'
  73 Beetle

  On Mon, Jun 28, 2010 at 9:46 PM, Scott Daniel - Turbovans <scottdaniel@turbovans.com> wrote:

    Did they know about camber adjustment via the eccentrically mounted upper
    A-arm inner long bolt ?