[jasonL78]

Bill I see 2 stripes on the side of the frame rail. My 68 L79 had 2 stripes. I thought they might be some sort of witness mark for bumper bracket bolts. I worked in an automotive factory building steering columns and every bolt that was torqued down had a witness mark on it. But why the line and not just mark the bolt head is what puzzling. Also why only the driver side? I would just duplicate what you have found not what everyone else has done. That is where people go wrong IMHO with witness mark restorations.