I'm looking at swapping the engine in my 2010 Fiesta 1.25, to a MR155 (Mountune tuned 1.6). The engine comes with the gearbox, air box and ECU. Would this be possible, i.e would the new ecu just plug and play or would it be an extremely complicated pain in the !Removed!? If anyone has anything to share then it would be a massive help, thanks!!!