The JKS bar will bend before the Currie will, that's been proven. The tube is thicker and is heat treated while I believe the JKS just uses non-treated DOM. The JKS bar will hit the diff cover before the Currie bar will due to Currie's offset JJ. Lastly, the Currie uses a 5/8" bolt instead of the JKS's 9/16" bolt at the frame end. This isn't a big difference but it can be torqued quite a bit tighter, resulting in a bolt that won't ever loosen up on you. Also, it takes a 5/8" bit to totally remove the factory taper so you've got more bracket surface against the 5/8" bolt vs. a smaller 9/16" bolt. The Currie TJJ comes with a bushing that uses a 1/2" sleeve for a larger 1/2" bolt and I'd recommend going that route.
I ran a JKS bar and now run a Currie bar. It's the best off-the-shelf bar available, period. You'll obviously have to remove the Nth bracket. If you'd like to spread the load to the opposite frame rail, this wouldn't be tough to accomplish using some tube.
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