Magnum 5.9L vibration

Looks like vibration is stronger, and does not changed after 3 different flywheels changed. I suppose it's coming from the torque converter or from somewhere else...

I have it, it's smaller (10`) bolt circle.
Hi. Not trying to sound like a smart ***. But you do know that you have to file one of the bolt holes to get a after market converter to work with the stock magnum flex plate. I had to do that to get my 8 inch coan converter to fit my 2000 360 magnum engine