Irrespective of the ignition, it's always best to degree your camshaft. The stock cam is nearly stupid-simple to install (notch oriented, TDC on #1 and you're done). But if you have the head off, rotate the crank to find true TDC @1. Mark the ignition plate with a mark. Then install the head. Degree the cam with a degree wheel and find its true lobe centers. Adjust cam sprocket until it's correct.
You can simply replace the stock advancer with the C5 and rotate the C5 the until you reach the TDC and follow their instructions from there.