I think the greasser is talking about one of the "ears" that protruded down from the tranny case to which the exhaust support is usually attached.
There are two of them they have a hole in their center, the exhaust bracket is attached with a rubber bushing on each side and a bolt through the hole in the middle. There is no way any kind of glue will work, it would be difficult to even weld that ear into place and have it last. When I had that problem the aerospace welding guy I consulted told me he thought the aluminum case to which the "ear" was part of the original casting would have to be separated and he hoped that the heat from any welding process would not deform the larger casting itself. That's when I figured a separate bracket was the way to go.