If you are running stock arms, you aren't going to be able to tweak out the ball joints more than the stock can handle anyway. I made the mistake of going with cheap store brand ball joints in the past and learned my lesson quick... within a year, I was replacing them. Go with Moog and you will be ok till you upgrade to aftermarket arms or another set up.
Off road (Baja style) trucks run Uni-ball style Heim joints (example: Total Chaos for Yotas) and they get extreme cycle but, haven't seen anyone run them on a bagged truck. A couple companies make them but I havent seen any in person for bagged trucks. The arms have to be built to run that kind of joint though... I have thought about going this route just for fun but... sold my c10 and looking for a c1500 OBS RCSB to bag.
