whats up guys/gals? i have a friend with an 07 chevy silverado thats dropped 4/7 with djm controll arms (upper and lower) and a flip kit out back. trying to change out his ball joints (top and bottom ones) but having a hard time trying to see if we need to get them from djm or just an auto parts store? and also his rear bounces a bunch he has bell tech nitro drop 2 any ideas as to why it would bounce so much?