There is a thread on here somewhere about using a wiper motor from a late 80's Ford Ranger or Bronco II. It looked pretty easy to do I think he even added the delay feature. If I remember correctly he just fabbed up a mounting plate to mount the motor And had to play with the lenth of the arm on the motor to get the sweep of the arms right. I am sure with your fabrication skills you will find it quite easy to do. I have plans do this mod my self at some point. Good luck
Jack..