On an american car, and including the german made 2000cc for Ford, if ALL the dots line up you have a winner. Every cam gear and every chain and/or gear I have replaced, the notches have to line up exactly. Becareful, you can be one tooth off and it can change the timing by as much as 10 degrees or more! The cam gear should have a dent in it or an arrow, same with all others gears.
That is the beauty of Pete Jackson gears, you can only be right on or 180 degrees out, either way will start up!