The hull number you gave me is something assigned by your state and has no relevance to the boat. The boat's hull number is stamped into the builder's plaque at the aft cockpit bulkhead. Typically the hull number will be on your mainsail.
As to the rudder, I assume the post curves around the prop opening, as all keel hung rudders are built this way. Since the most leverage of the rudder is at the bottom surface you would have to have integrity of the rudder post down its full length and tied into the flush gudgeon.
The way the rudder is designed, the bottom of the rudder does indeed rub against the top surface of the rudder shoe--i think that is a better arrangement than the top of the pintel taking the full weight of the rudder (80 - 100 pounds) against the inside top of the gudgeon. The gudgeon is fashioned as a cup and if you had sand up in there from some thin water, it could grind away and damage the gudgeon. To reduce the abrasion from the bottom of the rudder against the top of the shoe, I fashioned a thin delrin washer that fit over the pintel. The washer provides a lubricated surface to prevent the two surfaces from abraiding.
One weakness in the Bristol 29 rudder is that since it is so heavy and "hanging" on the back of the keel at a 45 degree angle, over 20 years or so the pintel will wear out of round and the boat will exhibit shimmy in the rudder when the boat is sailing at speed. The shimmy is nothing to worry about, but it is a weakness in the system. I replaced the original bronze pintel and it was worn on the forward surface. I have had no issues with the replacement pintel I made.
Another issue to keep in mind in building the rudder is that the distance from the top of the rudder to the underside of the hull must be greater than the height of the pintel or you will not be able to lift the rudder off the pintel. A better engineering solution to the pintel that I wish Herreshoff and the Bristol yard had employed would be to create a tube for the pintel drop out of the bottom of the rudder shoe and secure it with the athwartships bolt, so that the pintel can be removed. Or, build a bronze or stainless shoe that through bolts to the keel. But it is what it is. Again, as I have said above, the key is to build a strong rudder stop to keep the rudder from lifting.