Resonating vibration

I have a 72 Duster 360 magnum with a 518a transmission. It's just been put together and there is a vibration when parked and I accelerate and when driving around 2000 to rpm. I've read about the crank vibration damper and the magnum flex plate.

I'm attaching pictures of what's on the car.

There is no scallop or drilled holes on the flex plate that I can see.

Any help is appreciated.