1966 Barracuda not Charging

Will do! I'm double checking all the wiring with the wiring diagram. The charging system is pretty simple. I did charge the battery and it is at 12.6v. The alternator is charging slightly will raise the voltage to 12.9v without a load. Drops to 11.9v with lights on. Won't get up to 12 even with increased RPM. So I'll do the various tests again tomorrow and see what I can find.

I read the ammeter in the dash can be a problem. It does move and reads discharge slightly until RPM increases. Once RPM increases it barely shows charge and when lights on goes to discharge.

The wiring harness and block are new. Should I try bypassing the ammeter and see if that makes a difference and if so are there things to avoid so I don't burn something else up?