Couple things. Rubber on one end is bullshit. If your shit is built right you shouldn't have any vibes. JJ's on both ends is far stronger. When I ran the stock arms the rubber was never the limiting factor for flex so the added range of motion for a JJ is moot also. For short arms 2" tube with a .25 wall is overkill. Usually when a factory mount has it welds break is when they are used to limit flex and it fatigues them to the point of failure. But the biggest thing incorrect is going with left and right hand threads on a link. For a track bar maybe, that way you can adjust the axle left and right easier as things settle, but for links on a normal wheeler they are an unnecessary pain in the ass. You build your suspension, take measurements, build your links accordingly, put on vehicle, re measure, then if need be drop one end and adjust a bit. Once they're on you're never going to adjust them again.