Violent Take-Off Shudder

Leave the angles where they are they are pretty close.
If it's not shaking at highway speeds your angles a OK.
You have a clutch issue.
I had this issue on my Vette years ago when I trashed a brand new pressure plate.
Just for ***** and grins, have you measured your current crankshaft end play?

I had the bottom end built in a machine shop and he did measure crank play. I do not have a recorded value, but he said that it was within spec. I trust my machinist quite a bit. Pretty stand up dude.