Those marks have nothing to do with installing the starter. They are for setting the ignition timing, using the small window above the starter with the pointer in the middle of it. Align the BB with the pointer with the engine stopped, and turn the distributor housing counterclockwise so the points are just barely open. The timing can be set with either #1 or #6 cylinder in the firing position.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!