ASAP

I just installed a spec 3 clucth in my corvette. As soon as it was driving the car was grinding in all gears and especially in 1st and reverse. The guys say they believe the throw out bearing is bad. The car was tuned and driven with the grinding for a few miles because I figured that it just needed to be bled and the hurst shifter needed to be adjusted. Does this issue sound to be the throw out bearing? I also installed a new master and slave cylinder.