Try this guy, he seems to find hard to find things...Hey Ric, Any idea where I can find a backup light switch harness for a 1973 Plymouth Barracuda with manual tranny? Tried Year One and a bunch of others but so far no luck. Any suggestions would be appreciated.
I was going that route other than I would spot weld it, but I actually pick up a few from R/T specialties, Tom hooked me up !Just make one and screw/rivet it to the firewall, the harness will cover the screw.
Put heat shrink tubing over it, and paint it.