How can you tell difference between 67-69 Barracuda doors

I have more questions on these doors. Can you tell by the vent window wing door lock if its a specific year or model? I am posting some pics of different wing window lock designs and can anyone tell me specifically which design is a 67 door and which represents a 68 door? And can anyone clarify down on the vent at bottom of door where do you look for the screw in the "channel" and Vent screw location 67 in the channel (68/69 on the panel above the channel). I don't understand where to look for the screw at?

Also, if anyone can see or tell difference of a convertible barracuda door let me know in these pics. Its the same as a notchback door but believe the chrome strips location is difference.

Thnks,

Wizard

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