I have a swap I'm in progress of completing my tune on, I have a 6.0 with factory Pcm that I have put in my gbody mc with a 4l60e, my pcm is programmed with the 4l80e. I see where I can change the option to 4l60e, but what other changes are needed in order to have correct shift points.I have also switched the gear ratio and tire size. Any and all info is appreciated.Thx in advance