Clutch PP type is determined largely by the type of bellhousing fitted. IIa bellhousing uses the one with boss on the fingers and the S3 bellhousing uses the one with regular plain fingers. 9" clutches were only suitable for Sii and IIa.
There are other things that can cause issues such as worn slave cylinder pushrods, and worn or damaged throwout assembly parts
Originally Posted by kjva
I just put a Borg and Beck and an AP clutch pressure plate flat on the bench side by side. The Borg and Beck plate sits higher plus on the fingers of the Borg and Beck plate there is a boss. This makes the whole assembly sit considerably higher which may explain why the throwout assembly on my rebuild was not touching the pressure plate. Has anyone else come across this ?. Just about to pull out the gearbox again and fit the B&B plate