Car dropped 250 RPM and is now stuttering

Let me be the voice of reason for a moment. Think about the variables related to your engine suddenly running rough, the ONLY thing that changed was you added fuel! I've had a car that jumped timing, it didn't do any of the things your engine is doing, it just went down on power and tanked. I had a Chevy that had a vacuum leak and it developed a cam surge like a fuel car, but it was constant. I've had bad gas foul plugs and cause surging like yours is doing, but anew tank of gas cleaned everything up. I am not a MOPAR engine expert, but I think you are overthinking the problem. So let me ask you again, what changed?

I went back and read your 1st post. Lets assume it is not the gas, the chain did not suddenly jump and your distributor is good. This has already be asked but how about your MSD box. I've never had a bad one but from what I've read they go bad.