I have nearly finished my chassis restoration and have two pieces left. They are coated in POR15 so they should be chassis parts. the holes in the reinforced part are tapered (the side you see). About 4 1/2" long. I have looked at various parts blow-ups and have looked at the chassis and can't seem to see where they go. This is embarrassing but can anyone tell me what (and where) these pieces are? This is off a IRS car. Bruce