Hei conversion Intermittent start?

Well, there just isn't that much there You've eliminated the coil, so what's left?

Wiring problem

Distributor problem

Bad module.

Frankly if it were me, I'd do as I was thinking earlier---do what it takes to get a distributor, either junkyard, craigslist, or borrow one, whatever's cheap. You can use that out of the engine.

Even if you have a friend with a spare GM dist you can use it out of a car to test the module.