Instability Question

I found a guy that can do the alignment to the specs I wanted and where I could be there while he was doing it.

Another issue with some shops is they are taught to get it within the specs in their computer, unfortunately within specs doesn't necessarily mean aligned. They can have one side at +2% and the other side at -2% and their computer will say it's done, unfortunately that is not aligned, it may be within specs but it will pull and drive like $h!t. Having both sides exactly the same is the key and will make a world of difference.

Having big tires in the rear don't really effect the alignment, having the rear jacked up can effect the caster if there isn't enough adjustment to make up for the rake of the car. They use to make offset upper control are bushings to give you more adjustment but you had to know what adjustments you need before you install them since they get pressed in.