No. Mechanical advance does have an effect on rotor phasing. Any advance be it mechanical or vacuum changes rotor phasing. I think you are mixing rotor to reluctor phasing. The post is about cap to rotor phasing.
I respectfully stand by what I posted. Lets do this: drill the 1/2" hole in dist cap flat top 2/3 of the way between the center terminal and #1 terminal and cap off the vac adv. with your light ready, start it/rev it up & see if the rotor moves.
live every 24 hour block of time like it's your last day on earth
