An old Mopar mechanic 40 years ago told me after I had issues with Champion plugs to throw them in the trash, buy some Autolite plugs, gap them at .028-.030, put them in and go race. Still doing it, still working good.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time