'72 LeSabre Posted July 2, 2014 Share Posted July 2, 2014 Hey, what is the correct spark plug for a 1937 Buick 320 ci? The shop manual says AC H9, which doesn't appear to have been made in a long time. I did a search and saw references to AC 46 and AC 86. What's everybody using now? I just don't want to put ones in that are too long or too "hot".Thanks Link to comment Share on other sites More sharing options...
Mark Shaw Posted July 2, 2014 Share Posted July 2, 2014 I did a bit of Internet searching and found a tune-up kit on eBay with Champion D 16 plugs. I am not a Champion fan, so will a little more searching, I found a cross reference to Autolite ABC 170 plugs.http://www.steinertractor.com/ABC170-spark-plug Link to comment Share on other sites More sharing options...
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