I ran into this question some years ago and did not get a clear answer as to what direction or side . I don't know everthing but I view a torsion bars function the same way an extention bar on a socket set function and is used to absorb and transfer forces so why would it break when twisted either way ??? I have removed and reinstalled them and if my momory is correct I ended up with two r marked torsion bars and installed them as I had no other option and I have not spotted a difference. That car was sold so I don't know if they had a problem but the car ran and sat well.
