alright everyone i kno its been awhile for me, but i need some help. I just purchased a diablo sport predator programmer for my 03 1500 qc 2wd, and im not sure on the parameters for fuel and spark. i kno im gonna run 91 oct. tune, but as far as the fuel and spark im lost. Anyone out there with the diablo and has a good set up, please let me kno what you did or help me out. my other upgrades are an intake and straight pipe exhaust. thank you everyone in advance.