Rear Suspension Alignment

[Wldcobra]

Newbie question. I have a 2010 GT500. I have noticed the left rear wheels stick out more than the right. I have read this is normal. Why? Can the factory not line this up right?

My real question lies in aligning the rear end. I have ordered an adjustable panhard bar with adjustable UCA, and LCA from UMI performance. To align the rear end properly I am assuming the rear wheels need to be weighted? Is this something I can do with a plumb bob and eyeball or do I need a 4 wheel alignment. If I change the rear axle alignment is this going to mess up the front?

 

[Leonard 95]

If your gonna install the upper, lower and panhard bar, you will need to get the alignment check. When you start shifting the rear end back over, it sometimes makes the steering wheel off-centered cause it changes the setback. Don't need any weight for the rear end to do alignment.