The rack I rebuilt is out of an '87. It might not be original but I think it is. I think more likely the Edelmann 8740 kit is for the racks with aluminum pinion housing, which from what I gather are on either really early or really late cars. It would make sense that seal diameters (and nothing else) would be changed if the pinion housing were different. Someday I will find an all-alu rack and turn it into a race rack with no power and a welded up spool valve and I will report whether the seals fit.I think that kit is up to year 1988.