Bench Seat Question

[lkt1954]

I think I have the wrong bench seat for my 69 C10. I know it was in the truck when I took it apart 12 years ago, but it doesn't line up with the floor holes.

Seat bracket outer bolts holes are 47.5" wide and the outer holes in the floor are 51" apart on center. I do not remember how the PO had it mounted.

My question do you build/buy an adapter (if there is such a thing) or just buy the correct seat?

My guess this seat came out of a later model truck.

Thanks