does anyone know this 340 Duster?

The only thing I see wrong with this car that would be a major concern would be . The right/Pass. fender was either replaced or repaired.

The fender does not look correct above the light rim and also at the top in front of the door. Looks to have been Damaged and repaired. Or it could have been replaced years back with a new fender. I have seen these issues with new fenders years ago. when replacing them for collision repair.

One other thing is the rear bumper. The bumper to body pads are missing. These to were often not replaced with collision repair . Or maybe some one just forgot them after the repaint.

Why is a 40k car repainted under the hood and where is the fuel vent tube that should be run to the breather.

Just some issues you should look at . The rest are just minor things that can be addressed easily.

A/C alt. and it looks like it lines up. Bushings had to be modified for this otherwise the belt would not line up.

BEWARE! of what you don't see. Take an old timer that knows 71's with you to look at it.