Paragon has a cheap ball joint kit. DON'T USE IT! They have a better set (for more money, of course). The rules also allow us to use the bronze bushing for the bottom of the ball rather than a white plastic one that is standard in the less expensive kits. Get the best kit with the bronze bushings.
For $25 each, you can have your Koni's dyno checked. It one is leaking, it is not servicable but, if one is still OK, it can be kept as a spare.
Also, since you are taking off both corners, check the camber plates to make sure they are still in great shape and check the wheel bearings to make sure they don't need replacing and look at the tie rod ends. You may also want to check the alignment of the brake piston void area while you have things apart.
Big Dog