The b8es plugs are for a higher compression motor with a hotter cam. The 17g and 12g ran them (807-12 and 807-20) but they had 10.25; 1 and higher compression ratios.
16TS. 15TS, and 17TL 807 motors have compression under 10, and I’ve never run anything but bp6es on them and never had an issue with plugs.
16TS. 15TS, and 17TL 807 motors have compression under 10, and I’ve never run anything but bp6es on them and never had an issue with plugs.