How to set timing?

[JayRolla]

I just got my motor back from a fresh rebuild. I never set the timing on my car before and was wondering what is the best way to set the timing? I was told because of the altitude I live at I can run 7 degrees above top dead center. Is this true and what is a good precedure to set the timing?

 

[dave99gst]

http://www.plymouthlaser.com/timin.htm