Car lost all electrical while driving

Mike. I bought a new engine harness from YO in the first 10 years I owned the '67 and I don't regret it.
BUT that harness was no guarentee. I've now replaced several terminals and connectors on it. View attachment 1715556132
And now, finally, replacing the ignition switch which I've known for at least a year or two had some resistance in run....

Yep, agreed, but likely to reduce a lot of issues. Maybe that’s the best we can hope for on these old cars - try and shift the odds in our favor....