I saw a car with a home made hydraulic clutch set up. He bought a hydraulic cylinder from Grainger.
It had a piston start and travel limit adjustment. It was small and he bolted it up neatly. It pushed on the original clutch fork.
He said that there are also pull type cylinders available instead of push type. I never checked the Grainger cataloge. I'm only taking his word.

As for my Challenger, I used the McLeod hydraulic throwout bearing set up. I never had a problem with it. If you get the hydraulic throwout bearing make sure that you get the one that has the seperate fluid bleeding line. Otherwise it is very hard to get the air out.