spark plugs

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Motor Craft ASF-42-C @ $2.84 each work good for me for about 24,000 miles! A= 14mm head, S= Suppressor type F= Tappered Seat Seal 4= heat range # 2= Protected Electrode. I gap mine at .054". I have a basically stock ignition set up! Run 14 degrees BTDC with spout out!