Pop pop on exhaust side

Bewy it has two wires that go straight from the distributor into the msd 6 box. It's not a 6al
Just a plain 6 box. So yeah it would be voltage sensitive

Car has a brand new battery 2 months ago. And its always on a battery tender when I don't drive it. It hasn't shown low voltage.

I should have shown when I shake that failed blaster 2 coil you can hear the oil swishing inside. My other one makes no sound