When crawling under the 84 Westfalia over the weekend, I noticed the
passenger inboard CV boot gone and grease splattered everywhere.  I'm going
to replace them myself, although I have never done so before.  The question:
Do CV's have to be replace in pairs (left and right) or can I get away with
just doing the passenger side CV's.  The driver side looks good and was done
about 10K ago.