72 gmc jimmy clutch pedal binding when releasing

[gmc1971harwich]

On my 72 jimmy I have a hydraulic clutch set up with the sm465 manual,that when depressing the clutch it binds up on the way back up. But smooth when you push it down. Anybody know what could cause that? Today I checked the clutch master cylinder and fluid was at the min point, topped it off and it still does it. I've noticed that the clutch rod in the slave cylinder isn't centered but off to one side and when the clutch is operated the slave cylinder moves a 1/4 inch but all nuts are tight.