I'd use the Autolite equivalent (AR3910) instead. I've run nothing but Autolite plugs for years. Couldn't get a Champion plug to live in my built 340 years ago. Autolite plugs both lived and performed.
Autolite Racing plugs all have oversized ground electrodes for better heat transfer. A cut back ground electrode reduces bridging (carbon fouling between ground electrode and center electrode) and ground electrode shadowing. Copper core aids in cooling and improves resistance to fouling. Power tip or extended electrode plugs project the firing tip into the combustion chamber which not only aids in cooling but also cleaning so that fouling is reduced at low RPM.