rudder post

I've got a 1982 Catalina 30 that I've been slowly working on over the past year. When underway recently, I noticed that there was a salt water leak coming from aft near the rudder. I looked closer and attached some pictures, which I labeled. It looks like there was a previous repair at the hull...

We are attempting to remove the rudder on our custom C&C 43, to service and replace bearings as needed. Have successfully removed all the nuts and bolts of the quadrant, but having trouble with the final bolts securing the post in place. Can anyone describe how these last threaded bolts need to...