68 RR-wiring behind dash-car will start most of the time. My mechanic says the old wiring is brittle, many times spliced, and is unreliable. Do they make a wiring harness for behind the dash? I've been told no. I fear if I take it out for drives, it will shut off or not start after I turn the eng. off. Mechanic says all it takes is a little vibration or shaking up of the wires and it will shut down. Do I need to replace all those wires? I have already replaced the wiring on the firewall under the hood with a new wiring harness. I also worry about a short/fire. Your input would be appreciated! Thanks. Mopar or no car!!!
