Agree that the metal transmission cross brace/bracket had no paint identifier.
Mike does your transmission mount have a Ford engineering number on it?
Do have other examples big and small block 4 speeds with green or blue marks I've seen (as well as the yellows) Can't be sure which are possible replacements or originals. Have yellow service replacement examples (with the same stamped part number style as yours) also
Sorry to add to the confusion - just sharing