I need a new set of seatbelts for my 84 Matrix 3 vert. I know that the official factory verts had different seatbelts, but do the early non-factory ones?

I think mine are the originals, just placed differently. I don't know for sure, and don't want to buy a set till I figure it out. Does anyone know for certain? Or for that matter, at least know the differences? Thanks!