1970 PLYMOUTH DUSTER 340 727AUTO 3.55 SG ALL ORIGINAL B5 PAINT B7 INTERIOR

Is that a coil spring on the back?
The undercarriage photo with the coil spring ---- appears to be a picture of another car - not the Duster 340.

Also, does the seller have the windshield and rear window surround moldings ? Those are missing in the provided photos. Pictures (closeups) of the bare floors - trunk - rockers - and frame rails would be helpful in determining what metal work this car might need.

The car appears to be all there --- but the condition of the main structures and the components shown via closeup photos would be helpful to potential buyers. Thank you.
Lol….good eyes! All that stuff is gone now but yes, it had a few weird things in the rear and evidence of a trailer hitch at one time. I pulled all the no needed extras out of there, should prolly delete that pic actually!
That's a bolt on overload spring. (aftermarket band aid) I see it's bolted to a 8 3/4 rear end.