Wanted to update what I have done and where I am at.

I thought I had fixed the bad vibes. Went to start shiming the rear pinion and noticed that the rear u-joint seems loose. Well seems I had a 1350 yoke and a 7290 joint

So I got a new yoke and the vibe I had went away totally and all seemed to be fine. So I thought I was vibration free, well atleast as much as I can tell above the drone and vib of the TTI exhaust

This weekend I got out on the freeway for the first time and found out that I have a vibration starting between 65-70, up to that point it seems smooth. If you let off the gas it goes away, and pushing in the clutch it is gone.

Guess it is time to start shiming, I must be close since it doesn't start until higher speeds.