Can you identify these rear seats?

[KRB_K5]

Hello all, new member here. My 1970 came with some random parts on board including two different rear bench seats. Neither appears to be the correct one for first gen but I am not 100% sure what truck they are from.
First one looks like it might be an early squarebody blazer seat and the second looks like maybe 80's since its the flip/fold type?
Any help identifying is appreciated. I am not planning on using them in my first gen, hopefully they can be of some use for someone on their squarebody build.