I think you will like the Revnnator/Firecore/coil combo. I have it and could not believe how much better my car performs. I used to have the Mopar performance kit with chrome box. I know it sounds cliche`that I say how much better my car performs, but Im telling the truth. Starts better, idles smoother, and responsive. Burn offs so much easier. Mine is a stock 440-6. Had to do some tuning, cuz I had pinging issues with the MP one and when I installed the Firecore. Some spring changes on the Firecore and no more ping.
But always keep a spare ign box and ballast resistor on hand. Had the Revennator for 2 yrs now with no issues.