remove the tension on torsion bars

I will be doing this too soon.....
Should I count the number of turns so I can reinstall it close or is there a better way?

you can, but if you're putting all new bushings and joints, etc on, it'll change the stiffness anyway. I rebuilt the entire front end on my 74 charger, I counted the turns, had the Tbars marked so everything would line up exactly as it was and when i was done, I was a little over an inch taller.....