I just remember bits & pieces about the charging/ignition systems
Back in the 1950s, they had a Generator , a voltage regulator & a resister, the ignition & the starter.
When i was in the junk yards, i would grab every resister that was handy, if a car did not start & the battery had a charge, we tried the Resister next.
I forget when Mopar first began installing Alternators, but the Voltage regulator was still mounted on the Firewall.
At some point, Mopar was receiving too many complaints, because the Batteries were Over Charging.
The engineers messed around for a while & came up with building an Alternator with the Voltage Regulator mounted Internally
Mopar started using a Computer in 1970/71
I do recall that the Internal Voltage Regulator was controlled by the Computer & the computer will only allow the battery to charge up to something like 85% & then the voltage regulator cuts off.
That kept the Batteries from being over charged
More recently, hot rodders are going back to the External Voltage Regulator, because they need more than 85% of their batteries power