another wont starte thread. sorry

I would not assume it's getting spark

You must understand that the ignition power comes from two sources, and they do not "overlap"

When in "run" known by Mopar (diagrams) as "IGN1" power comes from the traditional dark blue wire, from the switch, through the bulkhead, to the ignition, regulator, alternator field and on some cars a few other things like electric choke if used

BUT IN START all that "run" buss goes COLD. NO power to it in "start"

In "start" rather there is a separate contact in the ign switch which supplies ignition power through the traditional brown wire known as "IGN2" out through the bulkhead, and to the coil+ side of the ballast resistor.

THIS CIRCUIT may be dead, and not providing "start" spark. You may be "cranking in" a whole bunch of fuel, and when you snap the key back to "run" you DO get a spark, which blows up the mixture.

SO.....................

very first thing to do is to rig a test gap (spare plug) to the coil, where you can see it under the hood, such as up on the cowling lip, and crank the engine USING THE KEY to check for a starting spark.