3.6 in a G-body clutch
 

I have an '87 coupe with a G50 which has a 3.6 engine out of a 964. Engine is all stock. Previous owner did the conversion and I've been fixing things up.

So here's my issue - the clutch in the car is quite heavy. I know it has a lightened flywheel and most likely a Centerforce clutch. The pedal is very hard to push. I've readjusted the pedal cluster and loosened it up as much as I could but it's still quite heavy. Is there a way to swap pressure plates for a Centerforce clutch setup? Or perhaps possible to adjust the effort somehow? If not, will a stock G50 clutch work with a 3.6 and a lightened flywheel?