Hei conversion Intermittent start?

Inspect the reluctor. If it is chipped, and/or if there are fine metal shavings everywhere....

You may have to compromise on the reluctor gap, and open it up a little to clear the vacuum advance effect. Maybe why it was so off to begin with? I have had to go back and forth to Advance Auto to get a good one. After a couple of time doing that, I inspected them before I left the premises!

Your wiring looks clean, BTW.