timing chain install question

Ford and GM lined the dots up together #1 compression stoke. The Dodge Brothers ( who provided the a model engines to Ford btw ) have always did this a little different. I've heard that their reason had something to do with cam and lifter positions for pre oiling. Another said it had to do with fixtures and/or pre tests on assembly line. I always thought it was simple logic. The closer together the 2 dots are, the easier to sight a straight line from .2. Who knows ? In the end it doesn't matter.
Since the crank is going to turn two revolutions for every cam revolution, 1 crank rev' = 1/2 cam rev'.
So... set the dots in either position, put the chain on, and turn the engine. One dot set up will lead to the other.
Only variables remaining are slot in distributer drive and rotor position.
Most cases, following the written instructions will lead to success.