It's going to shatter for the first 500 miles or so and it will prob also chatter on 2nd and even 3rd. The pedal vibration may be caused by lose adjustment. What firewall adjuster do you have and how much freeplay is there?
If the pedal is whats vibrating and not the chatter is what you're feeling, try using a different setting of the tree on the quadrant or just try to tighten the adjuster, sounds like its too loose.
I put the clutch cable on the 2nd hook of the quadrant and screwed in the firewall adjuster so the throwout bearing isnt touching the fingers on the pressure plate. 250 miles on the clutch, now the chatter is 50 percent gone and the tweeting of the throwout bearing is 95 percent gone.