When I bought my C27 (82), I completely removed ALL the original wiring and started from scratch. And I highly recommend it. The vast majority of the time, you will save neither time nor money trying to "fix" what was there.
As maccauley123 said, it is a good winter project. Let me know if you have any specific questions about the C27.
Last edited by rhaley; 10-16-2008 at 10:39 AM.