The day my '61 Falcon finally started after 8 hours of chasing a bad ground
Spent all Saturday in the garage with my multimeter and a wiring diagram, and it turned out to be a corroded ground strap behind the dash that took 10 minutes to fix. What's the longest you've chased an electrical gremlin before finding something stupid simple?
That corroded strap behind the dash, was it the one that bolts to the wiper motor bracket? I spent 6 hours on a no-start in my Dart once and it was the battery cable end looking clean but green inside.