If the sway bar links are really worn, they will not be able to do their job of stabilizing the vehicle and keeping it from leaning or rolling in corners. This can cause the steering wheel to vibrate at certain speeds, like around 65mph. If you want some feedback about your alignment, check for uneven tread wear on your tires. A worn sway bar link could also cause a clunking noise when turning or going over bumps in the road. It sounds like you have a good mechanic, so hopefully they will find the real culprit soon.