Stock the lower ball joint is mounted under the lower arm, if they are already flipped they are on top of the lower arm. And to do it basically unbolt it and remount it on top of the lower arm. for specifics go to
www.customtacos.com there is alot of help on flipping them thangs. If youre running anything bigger than an 18" it might not be a good idea to flip them as the bumpsteer is increased when you do this....good luck