Okay, I ordered HP tuners and am getting started today. I have a 70 mm turbo on a pretty much stock 5.3. It still has the MAF. I do have a 340 LPH pump With 80 lbs injectors. it has a small cam but im not sure which. I have a wide band installed and the engine does start and run but smokes like a fright train and the wide band just reads rch, or rich lol. My question is where do i start with this? What about timing, fuel, maf, i would like to get a good solid tune on this MAF then I will probably switch to a SD tune. I have been reading about this for a couple months, so im not new to terms and as far as running a new program, that should be no problem at all! Thanks in advance for all of your help!!!!