I have a 76 Duster and it came out with a /6 in it. I built up a 440 and stuffed in it. I am in the process of a complete restoration. Body work and paint done. front end rebuilt and its time for torsion bar replacement. I think it had the .890 in it. It read around .870 on the dial. I was thinking about putting the 1" bar from JS back in it. Are these bars marked left and right when you get them. Never done this before.Do you guys think that is the right choice. Thanks,Bill