73 electronic ignition help

OK did you check if you have voltage to the coil WHEN CRANKING. There are two different sources involved.
1...."Ignition run" usually blue, IGN1 from the key. This is hot ONLY in "run" and NOT "start."

2...."Coil bypass" usually bronw, IGN2 from the key. This is hot ONLY in start. It provides coil starting voltage, and bypasses the resistor

If you HAVE voltage "when cranking" and no start, the problem is most likely........

(no particular order...........)

Too much gap at reluctor / pickup adjustment
Damage to reluctor/ pickup or excessive play in shaft, bushings
Poor connection at distributor electrical connector
Bad pickup coil