1967-76 Valiant and Duster used the same external stamping for the fenders, but there were changes.
67 had no side marker.
68 had a round lighted marker.
69 had a reflector
70-71 had a flush mounted, lighted, rectangular marker.
72-76 used the corporate marker light.
The most correct fender would be from any Valiant/Duster from 1973-76. The 1976 fenders used a different antenna, so the hole through the fender is different.