Charging issues on a ‘64 Valiant...

Brand new to this. Really appreciate everyone’s knowledge. I have a 1964 Signet 200 and was overcharging from ~16.5-18+ Volts. I did a 1 wire Fleet Bypass on the Ammeter. Bypassed the bulkhead for blue IGN 1 that leads to the ballast. I switched the old 2 wire mechanical voltage regulator for a 2 wire electronic one with the triangle plug. Now the voltage with car running is at 12.45. If I turn on high beams, radio, etc, it drops to around 11.95. Now the battery shouldn’t be charging?, but I have been able to start my car 5 times now and run all accessories for ~5 minutes. Before when a regulator fried on me and it wasn’t charging I could only get her to start once after using a battery charger. Appreciate any input.