Welcome to American Muscle!
You'll want to read a bunch of stuff on here before you even consider engine mods. That V6 you've got is one special and very high tech steed. Treat her right, and she'll perform. Abuse her, and she'll bite back.
I don't know much about that V6, mine's an L99, but don't worry, we've got some VERY knowledgeable vendors on here who can help you decide what to do to make it yours, and still keep it drivable and trouble free.
I was going to direct you to the Snake Oil thread, but I can't find it. Our unscrupulous vendor may have whined until he got it pulled. He's always got a sale going.
James 1:25 *I don't tolerate fools.*
Ordered from Faulkner Chevy #NKCF02 1100 5/8/9 2000, 3300 7/16/9 TPW 7/20,GOT MY (low) VIN! 4000 7/24/9 ,Picked up 8/7/9!!! Signed Litho #45. Car signed by FBodfather 2011. Service: Jennings Chevy in PA. We don't "drift" kiddies... it's a POWER SLIDE!
MOTM/COTM Sept 2012 Pro Patria Vigilans
Click the pic..