Advice on ‘74 Duster

A couple bits of info- I would ask if he changed the rear end because it came with a 7 1/4. The red in the interior is incorrect and pretty much devalues the car a little. Is the front suspension still factory or were there improvements? That being said, the color is very nice, and it has buckets and a console. Check for rust and see how it runs. I would offer 12,000 if everthing checks out ok