I replaced mine about 5 years ago. I sort of recall that there were differences and that it's best to take some measurements with a caliper at the upper and lower shaft as well as upper and lower post. Luckily, Buzz is down the coast so I instead decided to bring my rudder and old bearings down. You should check the search function here. There was much written about it when I last looked.

Joe

:: What is the fix for the wear between the rudder shaft
:: and the tube it is in.

:: I put fiberglass shims in at last haulout. Worked for a
:: while, but is there any better fix. Lono #45