1991 Pontiac 600LE 3.1. My ball joints are shot. Can I replace them myself?? Are Moog parts better than OEM?? They are a little cheaper! Ever heard of "half ball joints" ?? Literally half a ball joint. Are they safe. I'm only keeping the car for another year and the "half" ball joint are covered for a year. Last thing, My wheel bearing on the right side is also shot, Expensive?? and can I do it?? Thank you Brent I have gone as far as replacing a clutch in a Civic, so I have some mechanical aptitude .