66-67 Dodge Charger Source Guide

Spark Plugs

Engine
318	J14YC	75
318LA	N14YC
361	J14YC	75
383 2 bbl	J14YC	75
383 4 bbl	J12YC	75
440	J12YC	75
Hemi 426	N13Y	64

Comments from members:

I see no reason to use exotic spark plugs in our cars. Maybe in a race car or whatever is specified in new cars today, but for us, whatever is specified as OEM or equivalent is just fine. There's no reason to spend more than what a standard plug costs.(Bruce Blum)