I am the owner of a 1978 J/24 #956. After launching the boat by lifting it with the bar between the aft two keel bolts the forward keel bolt pulled out several inches such that the bilge cover plate will not lie flat. I have tried to screw it back in but I can't budge it. I just bought the boat and it had a bulge in the keel as the result of water freezing I presume. I ground down the bulge, striped the loose material off the keel and re-faired it. I'm concerned about the bolt. Will it hold if I haul the boat by lifting the bar again? What can I do about the protruding bolt?