We found two 212 wiper arms from AM Equipment from Traction Heavy Duty Parts and they installed well. We mounted them on new Cadel marine windshield wiper motors, found a boat store. The wood underneath the dash (where the previous motors were bolted in) was all rotten so it was removed. We bolted the wipers on with out replacing the wood. In retrospect, with the removal of the wood, we should have got wiper motors with shorter stems (the part that goes from the motor through the exterior to the arms). However, the longer stems still worked well.