HEI Ignition gurus Help!

Well it has to be SOMETHING

Maybe the dist is on the ragged edge for trigger

Maybe the dist CONNECTOR is dirty corroded, this is a known problem Work the connector in/ out several times. Have you actually checked reluctor clearance?

I asked you about grounding have you actually CHECKED it? With engine running, probe the two eyelets on the module to battery ground and see if there is any voltage. Should be ZERO

Check supply voltage. Both coil + and module should be "same as battery" WHEN RUNNING

I've found coil to be non-critical on these. Many cllaim you must have some special E-coil, but I was running the stock old Mopar coil, no ballast resistor

You might monitor timing while diddling engine RPM.