I have a 67 with 396 4 spd that last year I had reversed the battery cables and had to replace starter wires, and coil wires. Ever since then it has been running rough. I had it tuned by a mechanic, and it ran like new for a week, then back to rough. Today, I unplugged the harness plug that goes into the firewall to the coil/brake sensor and other things, to see how hard it would be to replace the wires from the plug, but after looking at it, I plugged it back in. I also notice that the starter wires and become crispy again from touching the headers, so I replaced the one that goes to the coil from the soleniod, but the other one looks ok. Now the car wont start. It sounds like it it starting as soon as you touch the key, but it doesnt (even though when it is running, it takes a couple of seconds of turning the key to start it.) I know it is in the electrical, but I am stumped.