I've got 2 separate issues going on, first is a driveline vibration between 55-75 mph which is present with any amount of throttle. No throttle, vibration dissapears. smooths out around 80 and below 50. My best guess is center support bearing, need opinions before I tear into it.

Second is the death wobble in the front end, I've changed out the track bar bushing already. Shocks are Bilstiens in good shape. The wobble only happens below about 50, and can get very violent. Would the alignment contribute to that, or are the ball joints the likely suspects?
Is there a write up on balljoint swaps out there?
Thanks,