I just got hp tuners last week and I have been trying to get my tune straightened out. I paid a tuner with efi live to tune the swap for me. mph was off bad and it would backfire bad when it shifted and just ran bad.. I called him to get him back out and after waiting a week he didn't show so I bought HP tuners. So far with the help of this site I have it running way better. He had it running in SD with no maf or o2`s. I put those on it this week and figured out how to do a log today. seems my stft is way high. I am going to try and attach the log file. The motor is a 04 5.3 with tm off 4l60e in a 1935 chevy 2 door sedan. 4.11 gears in a 9" ford 3400 circle d stall