Wow.....based on the comments here as to the challenges associated with a transmission swap - this appears to be a pursuit of a solution to a problem that actually doesn't exist. Unless you really want a challenging project. Driving my old 911 around Sebring and shifting perfectly on every shift on every lap was possible, but didn't always happen. The auto stick in our SRT6 is a pretty intelligent trans and I find it to be a better shifter than me on a consistent basis. As another commenter mentioned, I just downshift exactly when needed and let the upshifts occur on their own.