overheating dealt with, now out of timing!!!!!!

Hey guys and gals...finally was able to work on the v3. Replaced head gasket with a Honda unit(double layer, metal) and cleaned out the whole cooling sistem... Now I have to set the cam timing. I know is piston at tdc,, but the cam has the following: a whole at one side, two lines at each end and one of those with an "o" above it, and an "A" at the other end. I need to know how it needs to be aligned so I can finally finish with the bike... Anyone have an idea?... Thanks for the help guys!!!!