IML: 1968 Crown Convert spark plugs
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IML: 1968 Crown Convert spark plugs



I've owned my car for four years (third owner) and never touched the plugs. Are these considered a maintenance item which should be changed periodically or should I just leave well enough alone? I only use the car in the warmer weather. The most I put on the car would be 1500 miles/year and it's probably less than that. The car is running fine (maybe a little rough at idle). I pulled a plug and from what I can tell the plug looks ok. The wires look pretty clean and new. I did put an electronic ignition in the car when I got it.
 
The plugs currently in the car are Champion RJ12YC. Should I change the plugs? What would you suggest I use? Any benefit to using a higher-end plug such as NGK Iridium?
 
Thanks for the advice.
 
Tom
1968 Crown convert
1960 NYer coupe


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