Dude?
Everybody did leaf springs. That was like the default suspension for a car of that era.
Chryslers were known for using torsion bars, but that was for the front suspension, not rear.
The wheel is consistent with a Barracuda, in that you often see Baarricudas on those rims. I have no idea if they were a factory option or aftermarket, and they would probably fit on a lot of cars either way.
I’d go with the people who think they have recognized the differential, doorhandle, and steering wheel.