[spoke]

When this event happens, does your tach jump or fall to zero?

I had the strangest engine cut-out issue. Sometime would die when driving, sometimes wouldn't start. Turns out the wire for the tach which goes on the coil was shorting out in the wire bundle across the engine. I found it in frustration when I pulled all wires on the coil and started re-connecting one at a time. Engine ran good until I replaced the tach wire, then died. Probably not your issue but something to check.

Good luck,
Spoke