For those who have water leaking from dash...

I have the same issue on my Dart.
Have got the kit, but didn't have the motivation to crawl under the dash yet.
Although the left wiper-unit seems very doable, the rightside however seems like a lot more work.

My temp-fix was cutting a hole in a brake cylinder seal which I slid over the wiper-pivots.
But even that didn't do much good as the water still drips in on fairly good raindays.

I did replace the windshield gasket aswell in my case, as the outer rubber lip was worn/torn loose from the rest of the gasket.