Product review (4 stars): Buy the Blower Fan at the same time and save yourself a bunch of time and frustration.
I definitely recommend buying the blower fan and replacing that as well.  My blower fan would not come off so I had to take a hammer to it and break it into pieces so that I could pull the motor out.  Luckily, I read someone else's review that had the same issue so I bought the blower fan when I bought the motor and saved myself a lot of time.