[sunman]

You have the TFI module on the distributor you can check with freeze spray when the problem occurs. It’s an easy fix if it’s bad, I kinda thought someone had checked it already.
The PIP sensor takes pulling the distributor and a dist gear remover/install tool.
There was a class action lawsuit on the TFI module it’s the first thing you check if you have one.
Is this motor old and have maybe points or a Pertronix ignition? If so nevermind…