Our grade "B" fender extensions will have dings, scrapes or warping due to over tightening of studs. There are very slight differences between 1969 and 1970 and they do carry different part numbers.
Ford part # C9WB-16A168-B, Mercury MPC # C9WY-16018-A.
Do you have questions about your Cat's factory pinstriping? This link may help.