Flicker flutter

Folks , 68 Barracuda , has been upgraded some years back to typical mopar electronic ignition, recently new alternator ballast and voltage regulator. I haven’t had the car too long and never got the chance to drive it at night until after some of the parts changes . However , the lights flicker with acceleration, more pedal , faster flickering , all lights not just head lights . At idle it’s ok . The flickering are in sync with engine revolutions. All grounds are clean and good. No faulty or crusty connections Any where that I can tell . Ignition coil is stock, ignition wires are 8mm performance wires. No radio noises or interference detected.

Any ideas ??