Look close at the pictures of the different bolts OEM vs. China. This was the bolt from the Duster. Now I wonder why they made that bolt like that? Easier to mass produce for indexing maybe? LOL
Also the heavy duty K verses the standard style. Now I wonder why they did that in 1970. The inside was also different. I saw it when I cut the 71 k-member apart. To modify it for the Duster.
You use what you feel works for you. But I wouldn't push this junk on other members. I am not promoting the sale of anything. Just trying to show the better OEM parts. If you can find them use them. And only use MOOG suspension parts. I found out the hard way .