i did the thunder racing 220/220 .553 .554 112 lsa cam with the patriot dual gold springs. 7.4 comp hardened rods and new lifters. i started the truck a few times and from what i can hear once the idle settles it isnt bad at all... i dont have any 02 sensors in yet so it idles high but i think it will be sweet. everyone raved about the thunder racing cam. and the springs really arent all that much i think they were 200$ why cheap out on your valvetrain its going to cost you a hell of a lot more if one does happen to break... god forbid but spending the $$ now will save you in the end especially when you realize how amazing the extra power is and you want more haha... may as well go all out now... i bought arp head studs too... just in case and those were 170$ i duno man its your truck you do what you want.
09 CREWCAB LTZ SILVERADO, 6.2, SIX SPEED, CAI,