first of all let me tell you, the euro charge TCM,, DID NOT WORK , I went to the track, nice and easy the first run, the next four runs the car when the limp mode,,
327 is still in the car, my TCM has been sent to Chicago, I should get it back in about a week, set up for the 327..

To answer your question, if you wanted to put a 307 in your car, and have your TCM retuned 307,, and the person you trade with would also have to get a retuned TCM, simply because your car is a limited, and the car the 307 is coming from is an SRT 6,, I'm saying the TCM out of the SRT 6 has to stay in the SRT six,(any srt6),, the TCM in the limited has to stay in the limited,, now the best way to do it would be, the person with the SRT 6 to have a spare TCM set up for the 3.27 and the person with the limited have a spare TCM set up for the 307,
think I said that right

Let's put it this way I have two differentials and 2 TCM's, one differential has a 307 and a TCU for that,,,
the other rear end has a 327, and I'm having a TCM built for it , both TCU's will work in any SRT 6

the SRT 6 TCm will not work in the limited, ( unless it is retuned to the limited)
and the same goes for the limited TC M will not work in the SRT 6 unless it is tuned for the 6