68 Barracuda bucket seats in a 74 Duster?

n00blike said

Would 68 Barracuda bucket seats fit into a 74 Duster?

I heard I would need to swap the rails to A-Body rails. But I looked on eBay and didn't see and A-Body rails. I did see B-Body rails for $400...

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'68 Barracuda is A-body. However, the seats you have pictured are not original '68 Barracuda seats.
If you're looking for seats for a '74 Duster, you will need '74 and later (IIRC, someone will correct me if the year isn't quite right) seat tracks since the floor pan contours changed that year to accommodate a catalytic convertor, and the tracks changed accordingly.