Puzzled by engine vibration

[Thedub]

Good evening guys,
As I sit in the driver seat of my car, I throttle the gas and there is a decent vibration during the RPM rev. I though maybe it was the Harmonic balancer (it had a large gouge in it) So I bought an aftermarket one and installed.

Still the same vibration. Needles to say, Im frustrated because I know it shouldn't be doing that.

Any thought?

Im a experienced mechanic, however Im new to the WS6's.

I own a 2002 Trans Am WS6.

Thanks in advance for the help

Dub

[SMWS6TA]

Only on rev up? Like a stumble or stutter?

Check your motor mounts?