I use an alloy steel SHCS the 3/4 diameter is good to 44,180 pounds in single shear. The reason I used 3/4 was becasue of the rod ends not the bolts. I actually use a 1/2" bolt (19,635, single shear) in the front LCA mounting points. I used chromoly kevlar/teflon lined rod ends good to 28,081 pounds of force in the radial direction.
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