Going back to Chrysler ignition

Beyond what the others have pointed out as issues running this configuration. Is the ignition box chassis (paint removed to expose metal) grounded really well? What is you static timing? It sounds like as you accelerate the distributor is advancing and getting to a place the motor begins to like. How good are your engine grounds? Did you remove the distributor?

Why did you remove the MSD? Was there an issue with it?

Is the engine built? If so, what are the details?

The more info we have the better.