Bucket seats for '79 K5

[Fishermen0105]

Hey,

Looking for original bucket seats for my '79 k5. I know '73-'77 were low backs with same bolt pattern, and 77-'80 high backs should work. But does anyone know if the bolt patterns changed for '81-'85? I think the seats are the same but wondering about the seat tracks and if the bolt holes would match up ok. May have found an '81-'82 bucket seat to look at if that will work. I think slider knob changed in '81 but any major differences other than that?

Thanks