super hard clutch pedal

So first, what pressure plate are you running? What is the master cylinder bore? Are you running the full American Powertrain conversion?

Second, I really doubt that the pressure plate is too heavy for that hydraulic set up. Properly set up between the slave and master cylinder that set up should be able to push darn near anything with very little pedal effort. That same slave cylinder is what they put in their kit to run in front of a T56 magnum with a 700 ft-lb rating, so nothing running on your 360 in front of a OD 833 should bother it.

I would suspect pretty much every else in the system before I suspected the pressure plate. A mismatch with the ratio between the master cylinder bore and slave cylinder, a pedal ratio issue with the master cylinder rod location, a throw out bearing clearance or stroke issue, maybe some kind of interference or a plugged line. There’s a lot involved with setting up a hydraulic clutch with an aftermarket set up like that, lots of places to go wrong. The pressure plate force is honestly the last thing I’d look at if the pedal is hard to push with that hydraulic kit.