Eddie,
I am pretty sure that the Grade 8 and Metric 10.9 are almost identical strengths.
http://www.boltdepot.com/fastener-information/materials-and-grades/bolt-grade-chart.aspx
I was looking to replace the hardware since the grade 8 bolts seem to have a better fit. I know what slop in a system can do. I know you are not a fan of the AEV "lift kits" because the large use of brackets. I liked the AEV lift because you get progressive springs and shocks and do a good job of keeping the lift under 3". If you were to get a kit under $1500 including everything that offered an excellent on road ride and 2.5" of lift, but not to much that I need to change my drive shafts? I am totally open to suggestions, but I am not looking to upgrade in the future or go higher. My wife is already weary because she is only 4'9" and has a hard time getting in. So this will be a one and done lift.
To address the teraflex suggestion I have read that their kits have a tendency to sag. If this is unfounded I am all ears. I think part of the problem is there are so many options one can be overwhelmed and after reading so many reviews that this kit just works it makes you lean in that direction.
Thanks for all the help
Vince
Just wanted to add, although grade 10.9 metric and grade 8 standard have the same psi numbers, a 10.9 metric bolt vs an 8 shouldered bolt which is slightly larger (less free space in the hole) would yield a stronger joint, as it can eliminate leverage and freeplay.
Both the 10.9 and the 8 bolts are far stronger than what the Jeep is able to dish out.
If we are talking apples to apples (grade 8 vs 10.9 fully threaded undersized bolt), the 10.9 bolt will win because it is a harder alloy...however, we are not talking apples to apples but apples vs sliced apples....the grade 8 bolt in this case is shouldered, which changes the numbers quite a bit. If you want the best of both worlds, you can get grade 9 shouldered bolts, but in my personal opinion, that's way overkill.
The grade 8 bolt also has the bonus of having a higher clamping force for a given amount of torque. This is beneficial for things like trackbars where clamping force is welcome. Also, if you can shear a grade 8 shouldered bolt on your trackbar, chances are, you have much bigger issues to worry about.
I agree with Eddie that those stupid AEV front brackets to extend the sway links are moronic, and a lot of people have problems because of them. Get a set of crown OEM JK REAR links for the front....they are a perfect fit and keep the swaybar nice and parallel. I would also recommend a front adjustable trackbar if you want everything lined up nicey nice.