They are '77-'91. There is a paper label inside the new ones with a D7 part number. They were mounted on '77 F and E series trucks just not '77 Broncos. In '78 they were on Broncos. I'm having a problem getting them polished without taking the black paint off. Suggestions? The aluminum just wasn't polished as new, and the mag wheel polishing places can't say they'll be able to leave the paint.