Out of a 67 barracuda, will fit all Dusters, Darts, Demons, and Dart sports and Valiants from 70 to 75. Also 67 to 69 Barracudas, Darts, and Valiants. 67 idler arm attachment is a tapered bolt, may also be the same for 68 and 9. I'm not sure. I do know for sure 70 and up uses a through bolt...