I have the correct bolts for 70 cars and for 71 cars. The head markings are different for each year. The 70 ones have no marking and the 71 ones have an "R" in the center and several circles around the "R". I am out of town on my to a couple of car shows, so I can't post any pictures of them for about a week. Hopefully someone else has the same bolts, if not I will post when I am back. They are bolts, and not screws!