Vibration cause?!?!?!

So problem has been mostly solved. I ended up throwing in a new Mopar distributor that I had sat aside for my trucks build. This did NOT make the vibration go away. I then put in a new set MSD wires and replaced the NGK plugs for some good old Champion plugs. Now, there is a slight vibration around 3k, then it goes away through the rest of the gear!