No spark

Is this the Mopar electronic ignition, or aftermarket?
If it's the Chrysler electronic ignition, you definitely DO need a ballast resistor. You may have cooked the ECU, they're not made for a sustained 12+ volts (only when starting, not in "run").
If it's not the Chrysler ignition, you need to tell us what brand it is. They all have their own requirements.