Your description means that you have preload in the driver side. You are looking at the movable part of the spring perch. I always run them exactly the same in front and usually in the rear as well. Someone may have been trying to get preload in the suspension with the front springs. I would not recommend doing it that way. The accepted method in tube cars is to get your preload with the rear suspension. The driver side will be lower to the ground with positive preload. Your previous owner may have tried to preload without changing the rear suspension? I would put the springs in the same position on both sides and be sure that you have 1/2" of shock still available at race weight for bump travel before the rubber snuber begins to hit. You will likely need to check the rear preload after setting the springs in the correct settings so you know where you are.
Bruce