I am installing bucket seats in my 79 F-100 and now I need the buckels that come up from the floor because they stand up. The question is will other years work with my original shoulder harness?? 78 &79 are getting diffucult to find but have found several Broncos up to 96. Will any of those years work??

 

I'd say just get them from a bronco, or any early 80s F series.
you may have to have holes drilled and tapped, but it wont be TOO expensive.

While your at it, grab the center console, you'll thank me later, not a lot of room in these trucks, extra storage is more the reason to be happy.

 

What is the company that made the seatbelts?

There is about three of them.

The name should be on the buckle. "American Safety", "Bendix" etc...

 

no clue off hand