Once again another infamous case of cracked firewall on my 86 gt. The car has a t5 in it with a dual hook steeda quadrant, and steeda adjustable cable. The car has 17k miles on complete new drivetrain. I went with a spec stage 3 clutch and it has always had a very firm pedal , but has not been that hard to get into gear. Recently It has been getting hard to get into gear, so I've adjusted the clutch several times, and moved the cable to the second hook on the quadrant. It gets better for a day or 2 and right back at square one. I got looking around today under the hood and I now have a crack about 2.5 inches long spreading towards the passenger side from where the cable mounts into the firewall. I had someone push the pedal from inside the vehicle while I examined the cable and the firewall flexes quite a bit when pressed. I also noticed the protective jacket on the cable is cracked down towards the adjustable end at the transmission. Do any of you guys know if there is a manufacturer of a firewall support for this issue, or am I going to have to buy some sheet metal and fabricate my own bracket to repair this problem? If I have to buy sheet metal how thick would you recommend? Or can I just weld the crack in the firewall and let it ride? I do plan on replacing the cable as well. I do however drive the vehicle everyday..