40mopar Posted June 13, 2016 Share Posted June 13, 2016 Can someone suggest a good, commonly available spark plug for a 1946 Roadmaster 320? Thanks Link to comment Share on other sites More sharing options...
jackofalltrades70 Posted June 27, 2016 Share Posted June 27, 2016 I just realized that i hadn't answered your question. I am running an Autolite 295 in my 1947 320ci motor. You should be able to cross reference it over at NAPA or your neighborhood auto parts store. Matt Link to comment Share on other sites More sharing options...
FLYER15015 Posted June 27, 2016 Share Posted June 27, 2016 I run AC-46's in my '40 LTD. Found them on evilbay. Note; if you run a spark plug cover, be carful about the length of the insulator. Mike in Colorado Link to comment Share on other sites More sharing options...
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