Bulkhead bypass vs ammeter bypass

I would like to run a 90 amp alternator and I’m wondering whether I should just bypass the charge wires in the bulkhead or if I should bypass the ammeter entirely. Electrical draw will not be huge, just electronic ignition, headlights, electric fan
When I put my high output alternator in my 64 I ran directly to the +ve side of the starter. Ammeter always shows discharge, put a voltmeter in your system to monitor if you're charging. I still haven't!