I have been feeling the need for more power and wanting to take the next step. Currently I have shaker intake system with k&n filter, edlebrock headers and catback exhaust. So far I Have done a little research,but I would really like to hear some of your opinions on how I should go about starting up this build. Ty for any advice.

 

Inertia BV heads.

 

Can't go too hot on a new cam. 03's are the "red headed step child" of the family to quote many on here, as the tuning options are poor on an 03.
A 260 grind on a cam is doable, but anything hotter, takes a lot of effort on the tuning side.
Al.

 

If you were to Throw those cams on the 5.7 should I replace springs and valves? I also read about putting a 6.1 throttle body on, would it be worth it?

 

The tb won't do much without some head work. A larger tb opening cant help bring in more air without more air to grab. A lot of guys have done the 6.1 intake manifold with success. There are a few clearance hurdles to tackle with it though. There are a few threads on the swap. Any good tuner with a dyno should be able to extract all the power from whatever mods you decide on. Without a custom tune you won't see much improvement.

 

Skip the heads until last minute imo.
What's your gear ratio and are you 2wd? Guess you know where this is leading.

 

2wd. What are you thinking lol I'm not sure on the gear ratio to my knowledge it's factory.

Dudeman how much of a pain is the manifold?

 

4.56 or hole shot axle slappin 4.88's.

 

He's probably got 3.92's especially if with factory 20's