[biketopia]

Both BTR and Texas Speed are top notch companies to deal with and very knowledgeable and respected in the LS world. I would send your heads off to get some port work done, Texas Speed will do them in house for you, my brother sent his in to them. Summit Racing has some killer cam combos as well. A lot of guys use them with great success over on LS1 Tech. For your 500 goal you'll definitely want the heads worked and a cam, your engine should have the LS6 intake so you're fine there, long tube headers and a good tune should get you there. No need to upgrade intakes unless you are going max effort then you'll be looking for a F.A.S.T intake and throttle body.