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Wow, I have one of these and didn't know that! Mine needs a date with the wire brush, it's a bit grungy. I have one of the silver dollar size round gap gauges in the toolbox too, and that's what I used on my trucks. The AC plugs I got from RA for Rawhide were really close to the specified gap, but I was taught to always check them(so I do). I've seen too many that have been dropped....I inherited one of these from my grandpa 40 years ago, and I use it regularly. The C in "AC" is designed to pry the ground strap without touching the electrode.Spark Plug Gap Gauge ACDelco | Auto Value
www.myautovaluestore.com
Mine is a little bit different, but still has the notches in the "C".I inherited one of these from my grandpa 40 years ago, and I use it regularly. The C in "AC" is designed to pry the ground strap without touching the electrode.Spark Plug Gap Gauge ACDelco | Auto Value
www.myautovaluestore.com