I have an electric fan I'd like to install in my '62 Dart, but after removing the fan there is still not enough room between the pulley and the new fan assembly. There is a short shaft that sticks out that interferes with the new fan assembly. Is there another pulley I can get? Or can / should I grind off that shaft? Also, do I need to consider upgrading to a new alternator? Thanks in advance, Brian Safford '62 Dart 440