You are probably not on this board anymore but if we could drop a stock srt6 engine in a manual crossie with the flywheel, crankshaft and an upgraded clutch all from the c230 coupe. Then reprogram the stock ecu from the n/a or srt6 so it wouldn't interfere with the lack of a tcu. Or program a motec to emulate a functionning tcu through a piggyback setup. How does that sound?