Seats come out easy when the floors are rotted away so bad that they took THE SEAT TRACK MOUNTS WITH THEM.
They’re supposed to have mounting tabs on them, like these:
Surprisingly the seat has some good parts. The limiting cable for the forward folding is in PERFECT shape. Usually they’re broken and the seatback just flops into the steering wheel when you fold it forward to get into the back seat. Found one more part I can use on my Trans Am!