Car Is Uneven

[badazta]

I have a 79 Trans am. I just replaced the air shocks and old stock suspension with new hotchkis springs and kyb gas-a-justs. The car sat uneven with the rear driver side 1.5 inches lower than the passanger side before the swap and i thought it was due to sagging. After the swap the passenger side is still 1 inch higher. The front of the car sits pretty much level. The car tracks straight and I feel no drivability issues with it. Any ideas of what is causing this? Also if I put a 1 inch lowering block on the passenger spring to level it out will that mess up anything? Thanks for the help