If your rear end is not centered with the body of your Turbo Regal, you can fix that by adjusting the upper control arms.
That means of course, you need adjustable rear upper control arms to accomplish this.
This video will show you exactly what you need to do, along with a great description of what exactly adjusting the uppers and lowers will do to the axle in the car.
It will also show you how to set your pinion angle the correct way, the measurements required to figure it out, and what they mean.
Fair warning, it is not a Buick Regal they use in the video, but the logic explained behind the adjustments & settings apply to the Turbo Buick none the less.
It’s one of the better videos on this subject, and isn’t too long.
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