Clutch cables are adjustable to take care for production/assembly tolerances and for clutch disc wear but not for stretch. If it is really stretched you should replace it as it will break sooner than later. I think the person who did the gearbox conversion knows best where to source the correct cable (maybe it is also from a Ford Sierra ?).
If I was you, I would remove the existing cable and take it to a Ford parts dealer to check it they have something in stock. Otherwise I would try a gearbox/clutch workshop where they have the facilities to do a taylor made cable with the correct fittings and cable length (according your sample).
Peter
Sage advice. If the cable had stretched that much, it is possible that several strands may already have broken. I’ve had it happen on motorbike cables a few times and it will invariably let go when you least want it to.
Problem in visiting Ford, is that nowadays, the first question is “what is your registration number” Feeding that into their computer does not reveal a Ford car of course and sadly, I have found that they don't seem to have people nowadays who are willing to search stock and who are able to recognise parts. Even if you say that it’s from a 1983 Ford Sierra for instance, it seems without a matching reg number, “computer says No!”
