Posted by Vaughn [108.79.207.178] on Friday, January 17, 2014 at 11:20:44 :
In reference to a post below, this link provides a source to help you identify the grade of fasteners used on our trucks. I realize this site provides data for later vehicles, but some of the marks used on bolt heads have carried forward and are relevant.
http://www.mmcdetroit.com/Market_Place/sample_book.html
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