Need help understanding Mopar ignition…no spark

Sorry to resurrect this thread but I'm at the end of my thread so to speak and could use the wisdom of this group. To recap, 360 motor, with Mopar HEI distributor which is now paired with the GM HEI conversion (wiring exactly to the image below). The coil is a brand new FD-478 and I have a GM HEI module and just replaced it with another to rule out any module issues. Still no start. I have power at key on and at crank to the coil and module (12v). The module is grounded properly. Cap and rotor are new as well. On cranking, i get one shot of spark then nothing. The distributor was new last year so not that old. The only thing I can think of at this point is the pickup in the distributor isn't telling the module to ground out the coil and generate spark. Any advice on where to go next ? Thanks in advance

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