The reason I went to a larger bolt and bronze sleeve was because the hole in the steel bar of the keel was wallered out. I wanted to put the sleeve in to keep that from happening again and also to make the pivot smoother.
I went with a 5/8" bolt because the bushing ( Ace Hardware ), fit the nicest with that size.
Macgregor, Venture 17 ,#998
Proud to be American !