Power rear windows in an early Dart?

No, but they are easy to make, grab some poster board and use the motor mounting holes to make the main part and mark the gear location and size, then take the gutted manual regulator and place the gear hole over the gear teeth in the regulator double check to make sure it clears the raise and lowering of the glass,plus make it in position to let you have access to the 10mm bolt or 3/bolts depending on what car/truck you got the motor from slot 1 hole for a tiny bit of adjustment so the motor meshes with the gear. tack weld it on to check operation in all ranges,once it's okay and you are satisfied with it then finish welding it up