All par alternator wiring change

There is more than one way to do a bypass. Even "Ma" knew the old ammeter circuit was inadequate, look up what is called "Fleet / taxi" wiring.

Look up "Mad Electrical" and read the article

Crackedback on here sells a bypass cable for this purpose

THERE IS NO WAY I'd put more than about 55A alternator through the stock wiring, and even then it should be torn apart, inspected and repaired accordingly