Hey David,
I would replace the pressure plate if I could find one. All the parts houses show is the 10 1/2 HD clutch kit. I would just change to the HD clutch but the flywheel I have has that recess for the 9 1/4" disk. I would have to change the flywheel too! May have to do that... but looking for other options. I fairly sure that the pressure plate I have is the right dia.... but is for a flat flywheel (no recess). That is why it slips... not enough pressure.

Thanks, Clyde