Why go with auto just because it had one in it? I mean, if you prefer ATX that is one thing...but to swap to MTX, the only real difference chasis-wise is one pedal(if reusing the ATX brake pedal, the pad does need cut down, but that is all) of course you would still need the transmission itself and all its associated parts, but just changing to a v8 from an I6 you have to change the throttle pedal assembly...whats one more pedal?