Do you have both dowels in when you installed your trans?

I forgot to put them in and ran my bully stage 3 clutch for about 10 000kms until a piece of the metal casting on the clutch broke off and lodged itself in between the pressure plate, clutch pedal was stupid hard.

If this just happened all of a suddden, your tranny will need to come out, you can try taking a peek in the tranny by pulling the little boot the clutch fork meets with the slave cylinder.