Very interesting timing, Engine Masters just did a show on ignition...
Plug wires,plugs ,then coil. they swapped in an MSD and ran it with a Chrysler Box, it was failing and would not repeat, then full MSD.
But you have swapped in new plus hot wired it to bypass ignition switch.
I think JDC mentioned fuel breaking down the hoses,I had a problem when I put a RobbMc fuel pump on ,the fuel would foam. The fuel line from the tank to hard line had broken down and it would suck air.
If you get fuel injection rated hose it should be ethanol safe.