Ballast, Blaster II, ohms, current, friggin volts!

You are both on the right track. Ms3x is the way to go. Same with crank fire, EFI. EFI, and ignition share sensors and many related and interrelated calculations. My experience suggests only a few percent difference in performance of an engine management system vs well tuned carb and distributor ignition. There is better, economy, less emissions and smoother operation under all conditions.

About COP, might want to try coils on an early 273. I think coil near plug may be a better fit.

After all the work .... a 3rd gen Hemi not a bad idea, or a new Challenger is better for us older guys with painful body parts.