Pinion angle help

I just installed my gear vendors unit and had a new driveshaft made with 1350 series ujoints. I'm getting a vibration which I assume is from my angles.

Currently my transmission is 3* down, pinion is 3* up with a driveshaft angle of 1.5*. Car is sitting level at ride height. I have SS springs and a pinion snubber.

Should I be adding a 2* shim to bring the pinion down so I can offset for pinion rise under power?