64 C10 5.3L/4l60e

[Justin71105]

Just going to leave as is and see what it does when it start driving.

If I have vibrations or my u joints don't last once I start driving it, I will cut the tunnel and raise it an inch or two to be able to raise trans to 3 degrees and swap out my shims for 1 degree and end up with 2.8 - 3 and drive shaft angle will probably move slightly but will get me closer to 2 degree operating angles.

From looking at it I just need to cut a 4" wide section from tunnel so if I get rowdy and motivated I might cut trans tunnel on a slow weekend or something as well and just see what trans angle I can get.

[SCOTI]

I would try to set the pinion so it's aiming the driveshaft as straight as possible toward the trans output but not perfectly straight. Drive it & see how it works. Make changes based off of that input.

Doing the calcs & initial set-up is good but don't get stuck on it. As things are added/altered on the truck, the numbers will change/vary anyway.
Looks like as I was editing my post you posted as well LOL....