I eliminated most of my vibration issues by raising the rear and running the car in first gear. Need two people to be safe!
By doing this I found one wheel was slightly wobbling. I took that wheel off and found the axle flange had been tweaked. Replaced the axle and solved the majority of my vibe issues.
Still not perfect, but a lot better than it was.
You'd be amazed at what you see when you get under the car when it's in gear
