I just finished front cj's in rear and rears up front. They are not a direct swap.
(this is my experience SPOA)
Rears:
You will need a relocation bracket to move the rear eyelet up forward of the oem and then you will need to deal with the extended length in the back. In my case I used missing links and mounted the rest stops on my aftermarket crawler bumper from RRO. I believe you may be able to get away with a extended shackle. I bought my relocation brackets from trail tough but there are designs on the forums if you want to build your own. My brakets had two mounting holes and I chose the rear one which pushes my rear axle back an inch. It still sits nicely in the wheel well.
Fronts:
For the rears up front you need to take the bottom 1-2 leafs out of the original front leafs and add them to the rears with the overload leaf removed. Some people drill an extra hole in their spring perch so that the axle remains in the stock location. I left mine as is and allowed it to extend my axle forward an inch. I have an aftermarket front bumper so I had no clearance issues and once again it looks very stock. Then you will deal with the same thing up front. You might get away with extended shackles but I bought missing links for the front with the rest plates from Trail Tough.
The ride on the road is much better. You will get some lift out of it. Expect to address other issues like shock travel, steering issues, driveshaft lengths, ujoint angles, ect. Ask me how I know.
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I haven't had mine offroad yet but I am pleased with it so far. I have had zero issues with the missing links feeling loose or anything. Just make sure you get new poly bushings all the way around and snug it up good.
