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Ran across this by chance. Thought it might be worth posting. PJ
https://www.angelfire.com/extreme4/skidoolympique/SPARK_PLUG_CROSS_REFERENCE.htm
SPARK PLUG CROSS REFERENCE
https://www.angelfire.com/extreme4/skidoolympique/SPARK_PLUG_CROSS_REFERENCE.htm
SPARK PLUG CROSS REFERENCE