Torsion Bar Adjusting

I read in the chassis manual for my 71 Dart Swinger that you can adjust the torsion bars for raising and lowering the front end? How much adjustment really is there? What's the best results or ways to go about doing it?

Thanks

Lift it off the ground to take some of the pressure off the adjusters, spray the adjuster bolt threads with a light lube and count the turns so you can match the other side.
Once back down roll it back and forth a few times to get it to settle where it's going to ride.
(once lifted the tires come inward and resist letting the car sit back down on the bar tension)
Amount of difference depends on the bar size.
I can tell you that 1.03 bars have about 4 inches with a small block.

Don't forget that changing the height also changes the toe on the tires.