High voltage

The problem is if you are still using the factory TYPE wiring with the bulkhead connector and ammeter setup. Even "Ma" knew this was inadequate and on optional (factory) 65A alternators used what has become known as "police/fleet/ taxi" wiring. You can look that up in the shop manuals. They ran larger gauge wire through separate gromments through the firewall and bypassed part of the bulkhead connector. There are many many posts on that on this board. The largest type factory alternator in the original size case is about 65A. Squareback is generally considered a better deal. Otherwise you will have to adapt something else. Many on here have gone to a later style, and people like Mancini have brakets to support them