Help identifying bench seat

[DD1]

Does anyone have an idea of what type of truck this seat may have come from?

I thought it was a 70's or 80's Chevy pickup, but in looking at LMC's catalog, these trucks appear to have the adjust handle on the left of the seat.

I might try to modify this seat to fit the 71 C10, but I want to try and figure out what it's for if I want to order new foam or upholstery at some point.

Is this even worth trying to fix/modify or should I junk it? It doesn't look bad from the top, but kinda scary from underneath.

I'll have to add a photo of the top of the seat later. Can't find it now.

Thanks!