$1,000,000 question!

[Vegas69]

It's the best way to achieve small working angles which will result in less driveline vibration with increased speed.

[rickpaw]

Or you can go CV joints on the driveshaft, instead of u-joints. Then most of your driveline angle issues will be solved.

[dcrider69]

I can possibly understand such with a leaf spring or non adjustable link car. But the correct way would be to adjust the pinion angle on the rearend, right?