Hi Royce, thanks for adding the new article on exhaust manifold removal and installation!
You mentioned that the rear most flange didn’t have a gland ring or copper gasket on it when you took it apart - it’s lucky that the manifold hadn’t sagged during that time to the point where it wouldn’t fit with the ring and gasket added. 
Mark,
I have been engrossed in building and outfitting my new shop in Tulsa since we left Dallas in 2019. Fortunately or unfortunately depending on how you want to look at it I have not been able to drive the T’s since September 2019 so the manifold was still in pretty good shape. I may have installed the Master Carburetor in early 2019 but didn’t drive much after that.