On the 300d my book only covers up to 82... but looking at the blow up you might have gotten lucky... one of the few things on these cars that look straight forward and not over engineered. On the 82 there is one nut holding the universal flange and then the sealing ring....probably need a puller for the flange and may get by with prying the old one out and pressing the new one back on... of course this is after you have disconnected the drive shaft from that universal flange...