65 Dart Turn Signal Levers - 2 Styles?

Joes Dart said

I don't know what the difference is but the '66 part# is 2661-516. I'm going to do some research to see what I can find out.

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That didn't take too long. '65 and '66 are the same with different part #'s. A guy on ebay has one for $145. This is what is in my 65.