Could you elaborate a little more? I'm not understanding how one is better than the other. If anything I would think a properly sized heim would be beefier? I do know that heim joints in steering linkages can cause issues with some state DOT.Dont use a heim joint in single shear situation, that's why they used a tie rod end/ball joint.
That was a simple explanation, i like pictures..:drool2:..lol. Double shear also stabilizes the load on a fastener, rater than trying to "twist" around the single point of attachment.The only reason the use tie rods in single shear is because they're a tapered pressed fit. Heim joints aren't. I'm not saying don't use a heim on both ends, just do it right and build the correct bracket.