leak from hunter 22 swing keel

[tinysailboat]

seems to be coming from the 4 bolt mount on the swing keel. is that common? What is the best way to lift the lead blocks out to get to nuts for loosening, and what would you use for rebedding them?
it is a 1981 style

thank you,

stephen

 

[IDtrucks]

Also interested in an answer to this process

 

[Crazy Dave Condon]

Take a couple of photos and post