G'day, I've started down the path of adapting a W5x gearbox to an A series to put in my coupe. I know a couple of other members have done this. I'm having trouble finding data on clutch cover (I'd call it a pressure plate) dimensions. The gearbox is off a 21r engine and if I can fit a clutch kit for a 21r that would be great. I just can't find how big the clutch cover OD is anywhere. I measure the flywheel at a bit over 270mm.

The Exedy number is TYC538 and it's fitted to heaps of different cars. One of them's a Pintara R31 with the CA20E engine. The clutch disc is 225mm.