Hood and fender shake

Yup, did the driveshaft 180* thing too. Have a look on Youtube. Search for Dart tire shake and see if that tire looks bad enough to cause my problem. The driver side tire does it too but not as bad. The shake has to be coming from the back as the steering wheel does vibrate or shake, it seems to travel through the car like an imbalance or something. I had put on a set of drag slicks one time and they were not balanced and the shake was very similar but more pronounced. Check out the video. Thanks again.