Coil - resistor compatibility question.

I lean towards matching resistance to the coil. In years past, such as the big 'ol rectangular Mallory coil, you not only ran the stocker, but also put a special Mallory resistor in series.

This may get complicated, because it's possible that some coil combinations may cause excessive load on the Mopar ECU box, but that does not seem to be a big problem.

Another issue, tho, in today's parts, are good quality Mopar boxes -- when you need one. Many? Most? you find have a FAKE transistor for looks on the top of the box. The real one (smaller, less heat sink) is buried inside the chineseoationized box

When I had my car together, I did something for two summers that at least one member on here claims you cannot do---I ran a GM HEI 4 pin module with a factory coil and NO resistor.