Won’t start No Spark.

You are checking for spark right out of the coil, ?

This may or may not be the same old saw about ign1 / ign2. Are you aware how Mopar ignition systems work?

First thing I'd do is pick up the ign supply line to the ignition system, which would come from the old ballast resistor connections, and make certain that you have power there BOTH with key in "run" position AND in "crank" position.

If you do and it will not start, make certain you do NOT have anything connected to coil EXCEPT ignition system wires. No radio capacitor, no tach, no nothing else

If you have power and no spark, check connections generally. You might try some other coil. Coils do not need to be mounted, or grounded, to try them.

If you suspect ignition switch, I would just "unwire" the ign unit temporarily and just "hot wire" it direct to say, the starter relay "big stud"