[deuce_roadster]

I am sorry i couldn't get to checking out another manifold today, will do it tomorrow for sure. When you look into the threaded hole, you should see a shape near the bottom that mimics the last 1/4 inch of the outside of the Ford nut. If you don't see a taper in there and then a hole past the taper for the protruding part of the tube, that would be a problem as explained, that is what makes the nut close down on the tube.