How Many Turns for the Torsion Bar?

I am close to completing my disc brake swap on my 1969 Dodge Dart GT. I am currently running, and plan to keep, my 15x7 inch wheels (4 1/4" BS I believe) on the car with 215/65R15s. In order to give myself a little more room under the front for comfort and to accommodate some likely increase in track width, I want to raise the front of the car up with the torsion bars. My question is approximately how many turns equate to how much rise in the car? For instance, does five full turns equal one inch of increased ride height? Would appreciate some insight before I start making the adjustments. Obviously, I can trial and error it, but I wanted to get some feedback that might help. Thanks.