I've heard conflicting stories on whether there truly are 1967 230SLs and this may be the cause of some of the confusion. My 230SL was sold and registered in 1967 as a 1967 model, however, the data card build date is in September 1966. I'm not sure that MB used the same model year numbering system that we do where the new model year cars would actually be built during the fall prior to the year they were designated as. My guess is the 1966 clutch kit is what you will need. Hopefully some of our other members can chime in here.
George Des