windshield wiper motor

I have a similar problem with my wipers and though i know what i need to do I just haven't tackled it yet. When I bolted the arm to the the wiper motor years ago when i was building the car, I installed it 180 degrees off. My wipers park in the up position instead of down. With console a/c in the way I just haven't found the energy to tear it apart and flip the arm over.