It pains me to see patched and taped up stuff in Harnesses with questions of why do I have this issue! I understand budgets, but wiring in 50 year old cars that have been bastardized over the years should be priory one!
Are suggesting replacing the whole engine harness? That's definately a reasonable approach.
I did that with my barracuda's engine harness about 20 years ago.
Saved the original, and when there's been problems with the repop, I've use the original for reference and even for parts - mostly connectors.
