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Old 09-17-2020, 07:06 PM
valhalla4771 valhalla4771 is offline
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57 Unknown bolt marking

I removed the bolt from the lower rear of block passenger side that holds the sparkplug separator. Bolt has unusual markings...a C with an underscore on the right side top. Also attached by the bolt was a thin brass plate 1" x 2" with the following number stamped on it: 126814. I'm trying to add a photo but not sure I'll succeed.
Does anyone know anything about these?
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