67-9 cuda door repair questions

I'm thinking of doing mods like Matt said. Except I plan on using the entire 67 shell and replacing the 67 guts with 69 vert guts and adding all 69 vert doodads to 67 shell. Another couple noted differences. 1. See pics Mirror mount locations are different? Not sure if the 69 location is from prev owner or not? I know the 67 door is factory location. I havent sanded the 69 door down to verify, but will eventually. Both doors non remote mirror.
2. See pics "Bellcrank " location is shaped different due to lock pull locations? I dont think it will be an issue as the door card will cover it.
One thing I was surprised is the hole for vent window adjustment, both have plugs, I thought that was 67 only?

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