67 Dart Wiper Arm Question.

Before I go and order these, am I right in saying that the new square plastic bushings are an upgrade from the original set up? Cause they look different than what's originally there.
Pics are of my wiper arms (2speed motor)....and the 2 speed kit from DMT.
I know the white plastic piece and the clip are for the wiper motor attachment point, I'm referring to the black bits that I'm assuming go on the pivot area attachment points in my pic?

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The round bit under the clip def isnt plastic. Neither is the one second one. Anyone use this new kit?

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