driveshaft angles

I found a rubber insert bushing. Moving the trans down would make the mismatch worse and I can't move it up for reasons that I am very sure you understand.

I don't think you're understanding.

If you're able to move the trans down 2* let's say. And move the pinion up 3-4* (with a shim) you're there.

Trans down (-2*) Pinion up (2*) those two angles are the same but opposite making them parallel.