ok , sorry, maybe i made it confusing in first place.

right, here goes lol:- i had a 1989 88spec s2. i have reshelled it into a 1990 90spec s2. the brackets for the REAR seats i took out my old shell, and come to put them in my new shell, but the bolts that screw the brackets to the floor and the wheel arch area are too thin for the 90spec shell

not meaning to put up a pointless topic, i just wondered if anyone else had come across the same problem in the past