M_Boats: New to Montgomery

Hello all, I'm excited to be the new owner of a 1984 Montgomery 15. I live in East Granby, CT and usually sail out of Guilford on Long Island Sound. I have yet to get out for a sail but am hoping to be able sometime in October. Does anyone know if 1984 M-15's have steel ballast in the keel, and whether the centerboard is fiberglass. Mine is well and truly stuck in the up position despite a couple sessions of doing everything I could think of to lower it, and I'd like to understand better what I'm up against. Also, is it allowed to post a boat for sale in this group? (Not the M-15, but my last boat) Thanks very much. David Gilroy