I don't know if you have the wiper motor yet. On both my '34's, I use a "hotrod" motor, same as a marine unit. Specialty Power Windows make a billet wiper arm that can be purchased "bent right or left or straight", cut to lenght, and the blade can be cut as well. I don't care for the billet look ,but they did resolve a problem for me and besides, I painted them black, so, no more billet!!!
Mike