When my car leaves the line with both front tires up off the ground it will go to the right just enough that I have to correct it. With a ladder bar set up what adjustment do I need to make? Thanks

more preload on the passenger side

Ideally, I would recommend you set the car on scales. However, if the car is pulling right, it usually means the left tire is planting harder, driving the car to the right. Some additional "pre-load" on the right side will often correct this. On a 4-link, this would be done by shortening the top bar on the right side. Since the bottom bar on the ladder bar is the adjustable one on most ladder bar setups, I would lengthen it about 1/2 turn.

If the car is setting fairly level to start with, this "pre-load" may cause the right rear corner to raise up slightly. In turn the left front will drop (I would take ride height measurements at all four corners before making adjustments). Tightening the left torsion bar will correct this, and in turn add a little more pre-load, which is why I would only adjust the ladder bars 1/2 turn at a time.

The first thing I would do is make sure the rear is square in the car.

We had this same problem, tried adding preload it didn't help. Started looking things over found the rear end had shifted over moving the ladder bars out of square. Ladder bars square car leaves straight again.

Putsomeone in the car with the same weight as you, and on passenger side make sure you have neutral preload. Meaning if you loosen up the nut on the front of the ladder bar it slides in and out without any tension. I bet your nut has a bunch of tension to it causing your car to move and not go straight.

I weigh about 20 pounds more than the guy I got the car from. We do have a set of scales we can put it on. When it goes to the right and I have to correct it. It will run about two off. Where we race if you run two off most of the time you are on the trailer. Thanks for the information.