340 exhaust manifold heat shield

I just noticed that these have the earlier heatshield like the 273 but are for a 340, it has a different part number 2863599 not 2946105, the 68 parts book has 2946105[] noting a new number. Pages in the parts book get updated as changes happen. So has anyone ever seen one like this?

In another post @S'cuder said he had one with the 2863599 but it looked liked the one with the connecting web.
[WANTED] - 340 Heat Exhaust Shield 68-70

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Alan