Identifying seats

Hello

I have a couple of seats I got when I bought my '74 Cuda back in 1987. I thought they were for the Cuda but noticed instead of threaded mounting studs on each corner of the seat slide rails, there are feet on each corner with slots in them.
A friend of mine suggested they could be A body seats but I have no way of verifying that.
The seat covers do not look anything like any 70-74 Cuda or Challenger seats I have seen but look like they could be original to some model of Mopar. The mounting feet holes are not the same dimensions as E body seats.
The oval or slot mounting holes are spaced at 13.5" wide by 14.25" long.

Anybody have any idea what these seats are for?

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