Sorry for my delay, it has been a crazy two weeks going through an acquisition and running around with the little one before Christmas. Everything is sorted out now. The seacock was the source of the leak as I had it open through the suicide valve. I was able to work it closed a bit more but I am going to have a gentle heat band around it for the next few weeks until I reinstall the intercoolers and can turn on the block heaters again, just to be safe. In the spring when I hall, I will work the valve a bit more and use the suggestion of lubricating it. Hopefully that will help it seat fully in an easier fashion. Thanks for all the help and it is good to understand better how the bilge canals flow in this boat.