NP told me to do a 228/228 112LSA and a 2800 stall, said that is a great reliable set up for the 5.3. I've done some research on it and there's right at a 90 horse gain from stock. That's with a tune to. The idle will make you fall in love. I don't have a cam so I can't say for sure, but that's what I'm going with. NP knows there stuff.