You have the Girling Calipers on your van.  On my website at
http://www.vanagain.com I have a How-To article on changing your front
brakes.  Just click on the picture of "Ken" and he'll take you right there
(now I'm starting to talk about myself in the third person, almost as bad as
talking to myself :)
Hope this helps.
Ken Wilford
Van-Again
John 3:16