Torque Strap install
I don’t think the pre 73 Dusters came with sway bar mounts. I know my 70 didn’t. I have a QA1 kmember now and just have a chain going to one of the sway bar bolts.
This picture was taken before I got the sway bar, I had to use a jam nut to hold the sway bar bracket. Also, not all 440s have a threaded hole on the boss where the chain is attached