Assuming that the wiring harness is good, you’re using an electronic-ignition coil and a known-good ECU and you’re running a hot wire to the positive side of the coil, it pretty much has to be the distributor pickup.
Go to mymopar.com and download the parts catalog. That will help you identify OEM part numbers you can search for.
https://mymopar.com/parts-manuals/
https://mymopar.com/service-manuals/
Update:
The Mechanical restoration is getting close to being completed. The goal is for the car to go into the paint booth in April and to have it ready for Carlisle, 2026. Fingers crossed on that.
Here are some photos of the detail going into the engine restoration.