Did you make sure all of your mounts are in good condition? The vibration must be travelling through the clutch cable. I would think mounts first. Also when does your pedal shake?
ya i know the gas pedal isnt hooked to it, but maybe i forgot to tighten the bolts to it or something when i tried to move it out of the way. i'l;l check the mount for the cable too.
Note: The clutch should be adjusted so there is no slack in the cable, and the cable is keeping constant light tension on the quadrant. The tension on the cable keeps the quadrant from moving on the shaft. Make sure the quadrant is lined up with the hole in the firewall when the cable is installed. If the cable is TOO LOOSE the quadrant may shift sideways on the shaft, causing the cable to bind. It may also result in a vibrating clutch pedal or rattle under the dash. If the cable is TOO TIGHT damage to the clutch or cable may result.