Couple of quick questions about replacing the ball joints. Just had my '87 inspected and my mechanic found excess vertical play in the LF and recommended to replace the upper ball joint 'at some point'. I haven't noticed any sloppiness in the steering...yet. I'd rather get this taken care of sooner rather than later, and I was wondering if I should have the lower ball joint replaced at the same time. Going one step further, does it make sense to do the right side at the same time? Also curious about how long the job should take per side. Thanks in advance!