Im looking to get my stock LS cams reground, b/c i dont wanna spend the extra 700 bucks to get stage 1 crower kit. I know this is stupid, but i have a friend that said his regrinds worked damn good, and only costed him $150 for set.what specs should i get cams ground to, to run mostly street but weekend racing. i also want to know if i can keep it air/careable ( like smogging). or do cams make your gasses shitty? should i insure b4 i get cams reground or does it matter?