How stiff do you need to be??????????
I think this proves that some of the rates that folks want to run are completely insane. I set this car up, it's way under 450 front springs (maybe even under 400, but I'm not going to spill all the setup info), with my front bar.
Looks pretty flat to me, and that's on 315 Hoosier A6's on Concrete... and one of the best part of the pic is you can see the state of the loaded front wheel/tire which I think illustrates well that you don't need -3.5+ camber (this car isn't even @ -3) to go with the "soft" springs.
Just thought you might like to see it: http://www.stranoparts.com/searchbymodel.php?ModelID=5