There are no rough spots when I spin the prop. I thing the impact was more to the wing. A big chunk about 8 in long by 4 inches deep. The prop was broken though so it did hit something.

The wing was hit so hard that the fuselage broke underneath the rear of the wing. It broke only on one side (a crack through the rear firewall if that's what it's called). I glued it back and it seems strong enough. Could that be causing the vibration?