The upper control arm bushings need replacing on my โ€˜97 Safari. I can swap the entire arms, or I can pull the arms and press in replacement parts. If I am doing this work in my driveway to save money, and I have the summer off because teacher instead of real job, why not save the money and replace the bushings and ball joints instead of buying arms? Also, why not do uppers and lowers at the same time?