IMHO
The wiring has worked fine for 54 years, as long as connectors are tight, no added loads, no corrosion, you will be good for another 54 years.
THAT BEING SAID...
if you want to bypass your Ammeter AND run another line (with correct fusible link) from alt to starter relay stud that will bypass the ammeter and other car wiring altogether for charging. By tying the ammeter wires together you will have created a redundant path for current to flow through the bulkhead connectors to all the cars needs. This will effectively halve the current flowing through each of the bulkhead connector.
View attachment 1715762971
As for originality, Ammeter will not move, and you can get a cigarette lighter plug in volt meter.
@Mattax look correct to you? Any issues?
