I just got a set of the PRW 1.6 iron rockers for a 496, they look nice! they're also available in 1.5 and 1.7 ratios, i was surprised to see that. their website has them listed for $399, when i called the rep told me the price was now $450 but he'd honor the web price, i thought that was damn decent. and just a few days ago i was installing them and broke one of the cup adjusters, a phone call and they're sending me some more for free. people on the pontiac forum have used prw rockers and like the brand so far.