Hydraulic Throwout Bearing?

[Tegguy]

Well this is officially my first post here on Lateral-g and I was referred here by a member on TeamChevelle.Com

So I have had knee problems since my time in the military and lately they seem to be getting worse. I drive a 5 speed Acura daily and I am having pain when using the clutch in there (Cable). My 72 Chevelle (Mid restoration) has the 4 speed in it and I'm afraid I won't be able to (either now or later) put the force needed to push it in. I was curious how much difference in force is needed between a hydraulic throw out and the regular clutch?

Also how hard is it to change and whats an estimated cost to have someone do it (parts and labor)?