Follow up test with a CDI ignition

The MSD boxes can also be triggered by points or magnetic pickup.
The extra challenge with the autotronics stuff is the MSD boxes fire multiple times in the low rpm range.

Timing lights can all have a delay due to their workings but the dial backs are for obvious reasons going to show the most slew.

That thread on moparts started because of a timing light
https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2488599/1.html
For how switching time relates to degrees Tuner posted:
"For some perspective do the math:
6000RPM / 60 seconds = 100 revolutions per second
100 revolutions per second X 360 degrees = 36,000 degrees per second.
Each degree is 1/36,000th of a second or .00002778 sec."
from Spark Lead (may have to join speedtalk to see this thread)

Multi-sparks and (some) timing lights
https://www.speed-talk.com/forum/viewtopic.php?f=1&t=33249