Ok i have a question. I was wanting to get a tune and i know i should get a thermostat too. I was also told i would need a thermo to max my timing out. The question is do they make one for an 04 4.8 yet, i know a while back they didnt make them for the newer trucks and that the old ones were diffrent. So if anyone can help me with this. Also can i put a stock LS1 cam in and it give me a little boost on my hp. I need all i can get. thanks Danny