I attempted to replace the curb side torsion bar today. It is the larger of the two (13/16). I'll post pictures later, but BOTH front torsion bars were 3/4". Sonja told me that the curb side would be 13/16, presumably because of the awning. Perhaps an awning was added later and the torsion bar not upgraded, or TM made a mistake on this one. I also had to grind the guide holes larger.
However, when I tried to install the new torsion bar, the end that fits into the lift arm was sitting about 20 degrees clockwise from vertical. There was no way I would be able to wrestle the lift arm without moving the shell forwards more. To do that, I'd have to lower the shell to adjust all the pocket stops. To do that, I'd have to reinstall the old torsion bar again.
So, the old torsion bar is back in, and the TM all buttoned up again. I want to contact Sonja and ask if the 13/16 torsion bar requires a different lift arm. It's going to be quite a squeeze to get the torsion bar in there.