Yet another question on vibration (Not the good kind)

My car is a 69 dart 340 4-speed.

The engine starts to rattle and roll at 3,000 RMP, kinda like a tweaker on a 2 week binge.

An old time Mopar guy told me the flywheel is on wrong.

A bit of background: This is the original engine for the car. At some point a cast crank was put in the place of the steel one. Maybe the steel crank was traded for a bag of the "good stuff" who knows. The thrust on the replacement cast crank went south because of too many clutch drops. So, I had the crank replaced with another cast crank and soon the vibration reared its ugly head.

What I am looking for is a diagram of how to correctly install the flywheel, if this is the issue.

Thanks for your time!!