TonyC - thanks for the great explanation, as always! So a stock mopar front suspension doesn't create more camber when it compresses? (because of a 15" tire compressing because of soft sidewall) I wonder because this guy drives the http://www.olympia-charger.com/ and I supposed he knows a lot!?

Yeah, I know on the wheel rate.. still surprised that the swaybar on the rear can make up for soft leafsprings. I hope my car isn't to stiff, although I am used to stiff european cars and our roads are mostly in perfect condition...

I was planing to keep the 11.75" with my FMJ calipers or then go with the 13" Viper setup... but this would mean 17" wheels... I just loved the way my last musclecar drove when I switched to 17", what a difference! Same with Gionni's 71 stock 340 RR with his 18/20", he drove the 1/8" faster than most of the cars with much bigger engines because he just had much better grip with this modern tire compound than the others with this crappy Radial T/A's...
But thanks for the tips, will look into those tires!