I'm putting a 2007 6.0 LY6 engine with a 2003 4l80e trans into a 1964 Chevy c10. I had a custom harness made for the LY6 4l80e swap but the people that made the harness are having trouble tuning the t42 tcm with a 4l80e calibration that will work with the e38 ecm. I know that some 2007+ 2500 Express Vans came with the 6.0 LY6 and 4L80e combo, where can I get this tune from so that I can just tune it myself. Or can anyone email me the 4L80e tune that I need?