I have an update! Keeping an eye on ebay for cheap 180mm 18 tooth and 160mm 16 tooth clutches paid off.
I now have two Luk clutches with identical centres:
[ATTACH=full]66473[/ATTACH]
[ATTACH=full]66474[/ATTACH]
For reference:
160mm 16 tooth Nissan branded Luk clutch: 301005F600
180mm 18 tooth Luk branded Luk clutch: 318013611
They both have the following numbers stamped on the centres:
Gearbox side: 619 01
Flywheel side: 551 01
Hopefully this will help folks source compatible clutches in future.
I will be attempting to make the hybrid from these two clutches within the next week or so.
