I have a 03 silverado ss with these mods, volant air intake, 3k stall, stage 2 heads with 10.5 to 1 comp., 224/558/114 cam and 30# injectors out of a 8.1 motor, asm headers, no cats, and magnaflow. I am new to doing tuning where should I start and does anyone have a file with close to the same mods I could look at. Thanks Tony