66 Dart Convertible window regulators

According to aftermarket application charts, Channel run for 67 and later are different from pre 67. I know the later has the glass resting in one small saddle at lower center. Only the plastic pieces attached to the glass and sliding in the forward channel prevent this glass from tilting out of the channel. I don't know what pre 67 has.
When I had binding in my drivers door regulator I also had a lot of wiggle and lost motion at the winder handle. The problem was wear in what looks like a bearing behind that handle. Its more complex inside than it appears outside. Anyway... removed the counter spring, drilled out rivets, used a few parts from a 75 Valiants rear window regulator to renew the 67 door regulator. So even if you buy a used drivers regulator from ebay, it may need some work.
By the way... beware that counter spring. Run the regulator up before removing the weight of the glass. Some have had the regulator arm fly up and shatter their glass. Good luck