[barrylnv]

Here's a great test on header sizes from the same manufacturer done recently by a respected tuner on this site: http://www.camaro5.com/forums/showth...ght=ted+header

Yes, cam will definitely make a big change. For that, here's a good article: http://www.gmhightechperformance.com...son/index.html

Most of those are pretty radical cams for street driving, though it all depends on your reference. Your best bet is to call 2-3 tuners you see on this site, tell them your current configuration, your goals, what you're willing to spend, etc. and they'll help you work up a configuration including cam that'll get you there. It's all about what you want and what you're willing to spend and that pretty well defines the final configuration.