I once heard that an ammeter kidnapped the Lindberg Baby....
In 1971 and possibly before, they changed the ammeter to a shunt style where most of the current isn't passed through the ammeter like it did in the earlier cars. It's pretty much the "Nacho" or "MAD" mod done for you. IMHO, a lot of the ammeter "OMG, your car is gonna burn" is bullshit anyway. What does happen is the terminals get loose and need to be tightened... BUT!! The huge problem that gets ignored and I think that most of these "ammeter fires" are due to the power connection under the steering column. That ***** of a connection is melted in just about every car I've seen. You see the big red wire going into the white connector and right there... in plain sight.. is a freaking huge burn mark. People just ignore it or try to clean it up and stick it back together instead of BYPASSING that MF'r. How many cars burnt to the water line when that one goes? And how many people on Facebook said "It was the dreaded ammeter"...
But, what do I know??