Hey, since I own an '83 533i, we might pool tech info as needed, especially since I see you're going the spoiler route too. I've got an IS coversion project going on for my car. I picked-up front/rear spoilers, sport-seats, springs, shocks and swaybars. Have you done/are you doing something similar? My email link is posted. A close friend on the list and close phsically, ol' Bill, has an '87is that I can inspect as needed for things. Again, thanks for the feedback.