Brazing it together again:
I made a fixture to align the blades and hold the brake bridge in place. It worked for the most part but I did have to redo one of the blades. I should have had another yoke under the tops of the blade to keep then parallel. After I was done brazing I used the brake hone to ensure the the insides of the fork blade were nice and smooth.
I used a hole saw to cut two washers out of a piece of 4130 flat and gas welded these to the cut off ends of the fork crown. These and the two long screws that go through them are what keep the fork from coming apart.
Here is the completed fork shown with a 411mm and a 406mm rim. The 411mm rim fits but the brake pads don't line up.
The completed assembly. I'll paint the whole bike after a through shake down cruise.