Nipple
I purchased a 1973 Last December. When we took her out for a shake-down cruise, I noticed a few drops of water coming in the boat around the nipple for the keel cable. When I tried to take the hose off the nipple, the nipple popped out of the hull. Fortunately, the boat was on the trailer. I have heard of several incidents where this nipple has broke loose. Two inches of water is a lot of water. If your gudgeon isn't loose, It probably would not let that much water come in in a single day. When I leak checked my boat, I unloaded everything including the boards that cover the bilge and completely dried the bilge. It was easy to see the water coming in around the nipple. You can lift the port lazerette and see the gudgeon bolts to see if they are leaking. Another thought! C-22 windows are frequently the cause of water below deck. On the trailer the water will collect in the compartment forward of the table, on either side. When the boat is in the water, the water will run back to the batter box area. I resealed my windows a couple years ago, and they are starting to leak a little again. I have a tarp that I put over my cabin when the boat is stored. This helps to stop rain water from coming in around the windows and crib boards. Another common place for leaks is the keel lock-bolt. This is probably not the cause of your leak, unless the bolt is missing. Once again, it is easy to see if this is the problem. David