Those energy suspension mounts are supposed to cause some vibration. They are supposed to be rubber.
How is the vibration now in park?
I just went through a vibration problem. I had a bent flexplate.
I would get a dial indicator with a magnetic base. Check the shaft for runout.
Also, download the Tremec app.
It makes checking angles simple. The number on the app will turn green when you are good.
I looked at the pictures you posted of the angles, and I think the rear should only be 2 degrees less than the trans. Yours was 6.