There's a method to break it loose but requires some risk mitigation, that is, do it in a place where you have plenty of time to react to things [i]not[/i] going as you had planned. Not knowing what your local conditions are (is your yard as big as a Wal Mart parking lot with nothing to hit?) Start the car and let it warm up. Shut it down. Place the transmission in first gear and restart it. Obviously, this is the part where you must have sufficient room to do this safely because the car will immediately move ahead briskly. With the clutch pedal depressed, apply throttle to accelerate rapidly. If the clutch doesn't break free, do a "clutchless" shift (if you're familiar with double clutching technique this should not be too hard) into second gear. With the clutch pedal depressed, repeat the act of applying power. If you have enough parking-lot left, you may move to third. If none of this works and you have survived the crash, there is little else to do but remove the transmission and clutch for proper repairs because the disc is so well stuck to the pressure plate/flywheel that nothing else will cure it.
Good luck.
Frank

Thank you for the reply, Frank. Right now the car is not where I have enough room to use your suggestion, but I may be able to move it in the near future to where that would be possible. I'll keep your instructions so I'll have them. Thanks, again, for your help!
Bob Gilzean

A dozen years ago when my clutch was stuck this is what I was told to do by Don Chase (Nebraska) who owned a tranny shop for many many decades.
1) brace clutch pedal against seat with 2x4 or 2x6.
2) drain existing fluid from clutch.
3) fill with TOLUENE
4) give her (Hudson car) a little rocking each day.

Within a couple days she was broke free. Just don't forget to brace the clutch pedal to the floor!

Robert,

Here's a method I have used successfully on a VW beetle and on a Citroen. I have not yet had to use it on my Hudson.

Support the rear axle on stands so the tires are not touching the floor. For safety it is good if the front of the car can be touching a wall or a large tree.
Hold the clutch pedal down.
Put the car in third gear. (If the car has overdrive, make sure the lever is pulled out.)
Start the engine.
Speed the engine up to what would be about 30 miles per hour. This means that the rear wheels are turning that fast.
Keep the clutch pedal down to the floor.

Suddenly step hard on the brakes.

This will stop the rear wheels. The inertia of the rotating engine should cause the clutch to free up.

Per

Robert,
Per's method is the same effect as mine but safer, easier and doesn't require any more room than your garage.
F

I freed my Jeep truck by hitting a big tree at very low speed.

If you use the "Car on Jack stands" method, make sure you place it in THIRD GEAR before applying the brake.
I know from experience, first gear places too much load on rear end. I ended up breaking the spider gear in the differential 🙁 l.

Regards
Dave Norman