I went with standard Z-bar for my SB in my 69 camaro. I did use heim joints and aluminum rods instead of stock rods to reduce binding, etc that comes with stock setup. This helps alot, as the heim joints makes everything so smooth.
I friend of mine has the hudraulic setup in his. It was not that bad to install, however we had to go that route since he was running a 427 with 2 1/8" headers and header configuration. He has had no problems. Just make sure to install a clutch pedal stop to make sure you dont overextend the hydraulic bearing. We got everything form Classic Chevy 5speed.
The hydraulic setup is more costly of course and takes more time to get properly spaced/adjusted from my experience.
my 2 cents.