Torsion bar direction

LaDemon said
I also have the torsion bars identified as USC 891L and USC 890R on my 71' Demon. I recently rebuilt the front suspension and converted to front disk brakes. I also pondered the front/rear orientation of the torsion bars because, IF the rotation of the bar is important, the way you put the left (or right) bar in will reverse the rotation. I had cleaned up and painted the bars and fortunately I left a witness mark on the left bar that had sassy green overspray on the USC 891L end. I figured that the only way to get overspray on that end is it had to be in the rear position. In summary:
USC 891L marking Left rear by clip
USC 890R marking Right rear by clip

This is all assuming that seeing I just got the car last summer, that no one had messed with these bars in the last 50+ years and they were in there from the factory install.

View attachment 1716198211

Swapping the bars front to back doesn't change the direction they twist, it doesn't matter which end points forward. Left to Right matters because of the direction of the hex offset built into the bars.

If you still have the bars out of the car, you can draw a little arrow on them, turn the bar around, and see for yourself. The anchor in the torsion bar crossmember doesn't move, but think about the direction of force required to keep it in place.