We extend to you a cordial "WELCOME ABOARD !" Come on in, make yourself at home, we are a friendly group of enthusiasts, and we also appreciate the classic Chris Craft Roamer, Corsair, and Lancer boats too , as they are all on the same family tree and share much in common ! Just start by posting a note introducing yourself to the group, that's all it takes here (we don't ask for or retain any personal information here, because our intention is to just "have fun and share information".
My '68 20' Corsair Sea V has a garboard T-handle plug about 3 inches starboard of the keel, slightly forward of being amidships, presumably the low point with the hull level. It also has a square-end brass plug in the transom at the bottom of the vee. This latter is used to quickly drain any bilge water when hauling the boat up a ramp on its trailer. I find both plugs very handy.