Pressing a ball joint in and out puts stress on the surrounding material. My question is, is the aluminum casting strong enough to handle the stresses of the process? A steel arm is flexible enough (ergo the use of aluminum) to handle repeated pressings.
not true. when pressed correctly, the knuckle is supported under and around the ball joint. you could press ball joints forever if done right and not cause stress.
it's cheaper to but the ball joints off Ebay, buy a 10 ton press at Harbor Frieght and still put $400 back into your pocket.