I'm working on a buddies car, 05 gto, 67mm sts turbo, tfs235's etc etc.. It was a 4l60e car, and he was going through them every couple months. Now he has a FTI th400 in it and I'm looking to change the computer to m6.. Did a search and didn't come up with much.. What is the best course of action on this? added the tune also.. Thanks!!