Originally Posted by budhayes3

If you're referring to the 5.3 in your sig, 317's will lower the compression and have a negative effect. WCCH and Texas Speed have some nice head offerings for the 5.3 though. If you plan on sticking with the 5.3, heads would probably be the next step if it were me...then maybe a TBSS intake. Another option is a 6.0 swap, or boost. If you go with a supercharger, I'd get a more boost friendly cam though, and set some dough aside for a possible trans replacement. There's a good possibility that a NA 6.0 or boosted 5.3 will eat your 60E for lunch

Originally Posted by gamble686

150 shot of Spray and a TBSS intake 90mm TB would be pretty legit for less than 1k if you do it right.

Originally Posted by BIG_D_74

Can't you mill the 317's and get a compression bump?
What about milling the stock heads?
Where's a good place to pick up a TBSS intake? Found this on ebay 09-11 LS2 Gen III Intake Manifold Assy TrailBlazer SS | eBay
Is this a fair price?

I had planned on doing something with the trans especially if I went with boost or a 6.0 swap.