Wiper Help....

Just trying to envision it in my mind, but the wiper motor should give you a set amount of throw as it goes around. Say 4" for the sake of argument. What I would do is put the wiper at the bottom of it's stroke, then move it to it's top location and see what location on the arm gives you the proper amount of sweep on 4" of movement. It might help to make a little paper protractor so you can simulate where the arm will be at the top and bottom of it's stroke. See below for a sketch of what I am trying to describe:

Wiper Pivot Throw.jpg

Don't know how the passenger side is driven... Does it have a tie rod that drives it off the driver side? I would think if there is, that they would have to tied at the same distance to get the same amount of movement.