I happened to notice on the O'rielly web site at the links above that they sell Master pro ball joints also at about$20 less each than Moog. They also have a life time warranty. I wonder if they have grease fittings ?

 

I did all my ball joints. Just needed an air chisel and some time and they came right out. On mine, both upper and lower were riveted so it was no big deal. It did take some time, but difficulty factor is near nothing.