Anyone swap a 73-76 duster rear seat into 70 duster?

I don't think the brackets moved. I think the '70-72 seat backs had a provision to be bolted down that the later ones didn't have but I don't believe that effects anything else. The seat bottoms changed in '73 or maybe '74 when they added the retractable rear seat belts. This picture shows a '70 seat bottom and a '74 seat bottom, you can see the '74 has the corners cut back to leave room for the seat belt retractors. But physically they exchange, you'd just have a little bare spot in the corner with an earlier car.

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