[Rhodes22-list] boat full of water, please help

[sugargroveumc at bright.net]

Hello All,
I need help. As some of you know I am restoring a 1976 Rhodes 22. I have only been at it for a few weeks. When I began I knew nothing about boat construction and I still know very little. 
Before we owned the boat it had been sitting on the trailer in the boat yard for three years untouched.
At this point all of the decorative teak and some of the structural teak has been removed, the lining has been removed from the walls, the hull is gutted, and I cut out all four of the rotted stringers as well as the one rotting bulkhead. Everything else has been removed as well. There is nothing in the cabin but the foam and the front bulkhead.
I say all this because it rained at our house last night and I wanted to experiment a little bit. I put the hatch up and closed the pop top making it as tight as I could. However, I did not put the tarp over it. I wanted to see if water would get in.
It did
I awoke this morning to find a good three inches of water in the lowest portion of the boat around the keel and center board housing.
There is no weather stripping, and the windows may need to be re sealed but they did not show signs of moisture. The port side drain in the gunnels was clogged so I assume that water backup and went in through the opening where the centerboard drop line runs. There is a hose there with fittings but it may be leaky. 
I feel that I can not progress in the restoration process until I find out where the water is coming form.
Does any one have any other suggestions?
Alan