Well, for a Morgan, this is straight forward!
Thanks for the 'heads up'. "O" ring and possibly black goop to reseal the cap.
As with most work in the rear end the most tedious bit is cleaning everything as much as possible before you even start. At least with the Super Max installed I no longer have to deal with copious amounts of black dust which seemed to get every where including self. Now it's just road grit. I still wear that but it is far easier to clean up!
