possible to dry newly wet decks?
My advice: move on.
You can find a number of threads, articles, books, etc. about repairing wet decks. Search this board and via google. I don''t think you''ll see much about mere ventilation doing the job, removing and replacing the old core seems the general solution. It''d be surprising, even for a Hunter, that leaking chainplates would wet the surrounding deck core. That''d be pretty dumb construction, but I guess it could be...
However, a greater concern would be that the bulkheads to which the chainplates attach are wet inside and rotting, and this problem you''d be talking real boat dollars to fix.
This is not exactly a classic boat, I assume it seems like too good a price to pass up - as I''ve commented from experience, the most you can hope for in a boat is to get what you pay for.