Any difference between the brackets/sliders from 88-91? Are they all interchangable or what?

 

88-89=same
90-91=same
To swap between those years requires some modifcation of SEAT and RAILS.

 

i believe the seat belt clicks in on the seat on the 90-91's and the 88-89 they are attached to the floor. Well i know my 88 si, they clicked into the release that was attached to the floor... i dont really know how to explain it.. ha