Originally Posted By RapidRobert
Good detective work there Nacho, that is a very good likelyhood, that it full fielded or near FF'd, enough to melt the insulation in that main circuit then it dead shorted. Now that I think about it when my '66 dart full fielded for awhile the insulation was badly shriveled & I did not notice a problem till I popped the hood later for something else & saw the carnage. I musta missed the ammeter reading. It ran fine & did not dead short but it didn't seem too far from it from the looks of things.

Great work guys. Hopefully this works for him.
So what will the ammeter show if it is starting to develop this issue? My battery shows normal voltage when running (between 13.7-14 V), but the ammeter rises far to the "plus" side on acceleration no matter how long the car is running.