Ok, well I tried cleaning up the the square bronze prieces because they look important. I used some sand paper. Cleaned up the coils connectors to the plugs. Made the misfire worse. Cyl 3 & 4 now misfire up to 8 each. Coils were swapped so im now thinking, ICM connection somewhere or plug wires.

Plug wires are AC Delco 7mm and were replaced Jan last year, I did not put the heat shields on them after the header install. Could that interfere with the wires over heating?