I had a 1972 Dodge Dart I bought new. The electrical system in general was designed by monkeys. I was warned early on to keep a spare ignition resistor in the glove box as these fail without notice and leave you stranded. It seems Chrysler chose to run the ignition system (points) on 6 volts and the rest of the car on 12 volts. Why on earth they did that is beyond me as all other makes used 12 volt systems.
I had a Chrysler Horizon the first year that they were made and after having front wheel bearings replaced six or sever times (every 1500 miles), they finally sent a top guy out to check the car. What they found was that the ground strap from the starter to the frame ground was missing and every time the car was started all the current went through the wheel bearings and cooked them.
The fact these cars are easy to work on shows in the photo as the owner of this Scamp must be having a lot of fun with it. The engine compartment shows a lot of modifications from stock. Aftermarket valve covers and spark plug wires, Carter Competition Series 4 barrel carb on an aftermarket aluminum intake which necessitated the mounting of the coil on the firewall, the windshield wiper motor has been removed. A fuel pressure regulator is mounted on the inner fender panel which most likely means the car has an electric fuel pump feeding it. The heater has been bypassed or removed because the hose which typically feeds it has been rerouted to the intake manifold. This car isn't your typical "grocery getter" anymore!
I had a 1973 Duster, w the famous slant 6, which was a hand-me-down from my father. The problem I had, when the car was about 15 years old, is that the column shifter wouldn't stay locked into Drive. Being disinclined to disassemble the whole steering column, I never figured out what the minor part was, that was holding the thing into the detent.