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dmsfrr · 07-19-2021, 09:27 PM

For whatever it's worth,
the '54 EBY / 256 engine I had used the metal gasket 14mm spark plugs also.

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07-19-2021, 09:27 PM	#7
dmsfrr Senior Member Join Date: Aug 2012 Location: Abq, NM Posts: 3,607	Re: Early Y Block OHC 239 Spark Plugs For whatever it's worth, the '54 EBY / 256 engine I had used the metal gasket 14mm spark plugs also. . Last edited by dmsfrr; 07-19-2021 at 10:23 PM.