M715 died on road No spark

Hello all,
My 715 was running fine. Took the kids out, a hot one here and after an hour or so of driving, she died. spent some time on it, no spark. I had a Pertronix in her, and thought the module might have died. Flatbed home and swapped in points and condenser - still dead. Swapped out coil - still dead. Swapped out cap and rotor - still dead. My NOS coil was never in spec for the original troubleshooting (no ballast required). New Coils, one chrome, one black, tested out fine. I had a spare NOS cap and tried that as well. Still, no spark. I am at a loss at this point. Ground from Distributor to body is good. Parts for these are scarce, and I am considering the lack of NOS parts going forward, especially for the ignition system.

I am considering going to an DUI HEI distributor, but that is almost $700 (see here: https://bjsoffroad.com/dui-hei-distr...ne-6-usa-made/ )

Yes, I have 24 volts coming into the coil, and I have replaced the Ignition resistor / radio filter as well.
I ran through the troubleshooting steps in the manual (posted elsewhere)
Anything I may be missing, or does it make sense to make the swap and use a step-down for the 24 to 12 volt for the new distributor?

Did you check that the distributor is turning? These trucks have been known to shear the roll pin on the distributor gear causing the rotor shaft to not turn. Since you checked everything else it might be a place to start. Also check the wire coming from the distributor, I believe it's the #11 wire as that can sometimes break internally and cause no spark even though it looks good.

Thanks for the input. Yes, the rotor is turning when cranked. The #12 wire to the Igniter is running just over 25 volts. I have not played with it to see if there is intermittent voltage, but every time I have checked it, it is energized.