I know this is an old thread, but I was directed to it while trying to determine what bench seat I just bought. I have a 72 K10, and the original is in pretty bad shape (multiple broken springs) so I bought another, thinking it would bolt right up but no suck luck. My brackets from my 72 won't fit it.
Looking at the photos in this thread, I don't see any seats with the same type of springs I have (in the seat I just bought) They just looks like rods that span the seat
Does anyone have an idea of what year and what it might be out of?