broberts Posted October 24, 2020 Share Posted October 24, 2020 (edited) I'm planning on replacing the spark plugs in my 1935 Dodge Truck (KH-32 V, Engine Number T13-7512). The maintenance manual (for a K-32) says the part number is S9 (copper, 14 mm thread, .025" gap) and there are J-8 spark plugs in there now. From the data I've referenced, it seems that it has cast iron cylinder heads. Any recommendations on replacement spark plugs? Edited October 24, 2020 by broberts (see edit history) Link to comment Share on other sites More sharing options...
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