There's bound to be a chance of some bushing wear after all these years, but that's not fatal. I wouldn't worry too much about it unless a survey turns up a structural issue with the blade or the stock itself.
Are you nearby? I may know this boat......
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)