I suggested disconnecting the 4 link bar only to do the basic ride height/corner weight set up. You know if the 4 link isn't neutral that it can keep the spring adjustments from making any changes in the car's height. I usually keep adjusting the bar to neutral while I adjust the spriongs but I thought it would be easier to explain this method.
I know a lot of guys will move static weight in a car to correct the way a car leaves. Others will adjust the corner weights and others still will adjust the four link. The latter is what I assume you mean by "put some asymmetry into your suspension". That is what I will do at the track if the car is not going straight but I still think you need to be close with the initial setup. Not everyone, especially a bracket racer on a budget, has access to a chassis dyno.
Of course I know Who Billy Shope is and I respect what he has to say.