Hi folks, I am just about to start with exactly the same type of door. Thanks Gene for all the information! I've just finished Camel lift fixtures for the Intermountain plastic boxcars and will now start with the Superior door itself. As you have seen above I've already drawn the CRECO hardware for that type of door and will let you know when they are ready.
The Youngstown door with lift fixtures is available on my website www.trainkitchen.com/downloads