Re: F10 champion plugs
... hmmph ...
Stumbled (before beer-thirty) across this in the 1957 FORD TRUCK WSM -
CHAMPION F10 SPARK PLUG -
ECR 272 ENGINE (HD) - 302 -332
It equates to AUTOLITE/MOTORCRAFT BRF-22 (also BF-22 which was a RACING PLUG in the day).
It is a cold plug.
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