The master cylinder rod is attached to your clutch pedal. Just get a flashlight and crawl under your dash and look at the clutch pedal and where it hooks to. Follow the linkage and you will see a clevis pin, with a clevis and a threaded rod that threads into the clevis. Loosen up the jam nut and start to screw the rod out(extend it)more than one turn,(8 or 9) and hit me back, that should be a huge help. Your pedal should engage roughly half way up, not right off of the floor. That right there is telling me that its not disengauging all the way.