stock type adjustable rear suspension?

[tt69camaro]

I have a 70 chevelle and I installed rear upper and lower adjustable control arms. I measured the stock length control arms and duplicated the length on the adjustables and installed. The car always sat higher on the passenger side and still does with the adjustables. I originally thought the springs were the culprit so I recently replaced them all. The car still sits 1.25" higher on the passenger side (front and rear). I'm now thinking I must have too much preload in the bars. What is the process of setting these solid mount adjustable bars up and get the car sitting level again? Is there something else that I'm not thinking about? Thanks