'67 NADA Spark Plugs

[drc123]

I can't find a reference in Green Bible for spark plugs on '67 NADA 2.6L.

Engine currently has AC R42XLS plugs that need replacing.

I find multiple conflicting references online, most seem to be for 2.25L.

Would someone confirm if the 2.6L uses a NGK B6ES or let me know what the correct plug is.
thanks

[Les Parker]

Hello there,

# of the Champion plug is N5.

I hope you can get a x-reference from there.