[Ozzie Goat]

I'm running out of options, and this is dumb.

I'm going to get the Taylor wires and see if they defy physics.

I have replaced all the plugs.
I verified the connection as I installed the new wires.
I used a heat sleeve over the plug wire boot etc

Didn't last ten miles. Arc to the header through the lot.

Only other idea is the dimple the header tube.