I thought I recalled that the class he ran was pretty darn strict. Although that's a two way street, all the competition is stuck with their factory suspensions' shortcomings too, and Mopar's definitely weren't the worst from a geometry standpoint.
It's very impressive though that he can place third against cars that aren't set up that strictly. I know he's running 18x11's all the way around now with 295/30/18's with a 200 tread wear compound tire, which is pretty impressive. But unless he's changed his engine it's still just a 340 set up to T/A specs, and last I'd heard he was running a 727 for a transmission. He has to be down horsepower by quite a bit compared to some of the pro-touring set ups.