I bought the Whiteline rear-camber kit KCA347. Apparently the camber can only be adjusted off the car. ie, you remove the link, adjust, re-install and check camber, and repeat the process until you've got the desired camber.
My mechanic ended up consulting with me, and installed a Pedders kit which you can adjust the camber without removing the link. This kit cost only $99, compared with the $145 retail for the whiteline stuff. I'm wondering what the difference is? I've done a search and found mention of "adjustable camber arms", i wonder if these are similar to the Pedder ones.