The original clutch cable on my 84 snapped the cable friday, so i go and get a new replacement one from autozone. I get it put in and the pedal was really, really stiff, i thought i was getting a leg workout driving. Anyways i am shifting and it snaps, by this time i am pissed. So i get out and the plate that attaches the cable to the firewall pulled off the plastic piece and the cable was separated from the firewall groment and the bracket on the cable was broken off. So what could cause this?? Help me please..