Bypassed AmMeter on 63 dart, now I get nothing
If the amperage draw is close to what the stock components can draw, I don't see what difference it makes to the ammeter as to what output the alternator is capable of.
Start by reading the MAD article.
Simple.
Because if you reach a situation where you have "a lot going" like, heater, headlights, wipers, (up here where we have winter LOL) and if the battery is down, especially if for some reason it is quite down, the alternator will REALLY tax the stock wiring. The wiring, the bulkhead terminals, and the factory ammeter are marginal, especially the wiring and connector
Ma knew this, and if you look up in the factory manuals wiring, cars which had optional 65A alternators had changes done which are normally referred to as"fleet/ police/ taxi" where larger wiring was run through the firewall using separate grommets.
Older factory ammeter wiring was none too large to start with. The bulkhead connectors are essentially 1/4" wide spade/ flag terminals. These were used in electric furnaces I used to work with, most of which as back up heat for heat pumps, and they FAILED often. These saw only 20--25A nominal, because a "standard" 5KW electric element draws about that amperage at 240V
