Electric issue?

Hi all.

Here's what's going on:

Car has a Holley 650 on a 360, car will start as normal in the morning after one or 2 pumps. After it starts I usually pump a bit more and then use the choke to warm it up a bit, then off to the road.
9 out of 10 times the car will die on the road at some point in the next mile and won't turn on again. I have to wait a couple of minutes and it will fire as normal and spend the whole day without any issues.

What the hell can be causing that?
I have replaced the fuel filter and pump and very convinced it's a electrical issue.

So I believe we have a few options:
-voltage regulator
-coil
-ecu?
-distribuitor

Main question is would a voltage regulator cause that and why? Though the VR was to charge the battery only but had some people suggesting the VR may be the cause.

Thank you.

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