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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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NGK may very well be OEM as Chrysler was changing over some engines from Champion at about this time. Your owners manual or underhood emissions sticker should have the recommended spark plug make and type printed on it. These should be 100K mile platinums.
Any premium plug wire should be OK. I usually smear a little silicone die-electric grease into the boot ends to ease boot removal when the time comes and offer some weatherproofing against moisture. A dab of anti-seize on the threads of the plugs also helps prevent thread damage when steel and aluminum sit together for a long time.
 
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