Pretty sure those are not the original seats. Don't think you get that plush in a Plymouth in 1975. Look like they might have come out of a New Yorker.
Agreed. Not even sure if you could get cloth in those could you? I would think certainly not that fussy of an interior.
I believe you're correct there. Looking through brochures on-line, the '76 New Yorker had a very similar upholstery pattern. (Only saw it in a small pic, so can't be positive...) Also, looks like the second seat is still the original Plymouth vinyl one, looking at the top of it from the 'tail gate' shot.
Yup, that wagon probably had them bucket looking seats with the bench bottom and tall head rest, and has a arm rest in the middle. At least for the front seat