Guest dougklink Posted October 26, 2011 Share Posted October 26, 2011 What heat range plugs have people had good luck with in 12's? Mine is a 1936 and came with J7's, which seem a little cold to me.Thanks! Link to comment Share on other sites More sharing options...
Earl B. Posted October 27, 2011 Share Posted October 27, 2011 The following is what I have for the Packard 12Resistor--Autolite 306--AC Delco 48 or B49..........Non resistor--Autolite 295--AC Delco 45 or 46I hope this helps, B Link to comment Share on other sites More sharing options...
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