1972 Duster Shop Manual Effectivity

Mechanically, the Duster is nearly identical to the Valiant. Where there are differences, for example the doors or quarter glass, the FSM will include directions for each.

Just be glad you don't have a 1967 Barracuda — the factory left it out of the manual all together. They issued a dealer service supplement to cover the differences later, but it leaves a lot to the imagination.