You are the one that brought cam and crank timing into the discussion adding additional disinformation. It has nothing to do with the question asked.
The best way to time a mechanically sound engine is with a timing light. The best way to set timing on an mechanically unknown condition engine (or performance) is with manifold vacuum. Too many mechanical variables to depend on a light.
I don't get it, generally you always seem to want to argue against points nobody has made, generally crapping on threads, and stinkin' up the forums that way.
That's the trouble, you seem not to get it. What I attempt to do is water down the testosterone and dis-information displayed here and one trying to out lie the other.
If that is what you consider stinkin' up the forums at least enter (IMO).