Did you have the drive shaft balanced ?

 

I realized I never updated my findings. Thank you all for your help.

I ended up getting new leaf springs and coils springs and spacers. I had another issue that needed a shackle relocation bracket.

I also installed a t-case drop.

Now, my pinion angle is 4 degrees pointing up and my tcase output is pointing down 4 degrees.

So they are now basically parallel. I am still getting vibes in the 25-35 range. I'm going to check my u joints and balance drive shaft next.

Before the t case drop it was undriveable from the vibes. So I am slowly getting this figured out.