We did not know it was a simple issue before it was resolved. Of course I would not swap a full loom and ecu to cure a mis-fire BUT, my philosophy is that if something needs to be changed on my car I buy something new and ideally improved. IF it had been something like a corroded loom or failed ECU component then YES, I would chuck brand new and modern stuff on it. I would always look for a benefit in anything I had to change on the car.