...A 'Good' Condenser is there to keep the points from Arcing. A 'Clean-Break' of the Current to the Coil is necessary for a Healthy Spark, through the D. Cap to the Plugs. With 'Arcing' of the points, there is Not a Total Collapse of The Magnetic Field within the Coil, That Creates the Spark. The Spark is Not Healthy. Should be a 'Blue Flame'.
Everyone is putting in Their Guess, of Which of a Dozen Failers can Cause a 'PoP', without Starting.
This guy has a lot of Searching, Testing, work ahead of him.
That's as far as I'm going. Don't Test the Coil Improperly and Burn it out!!
MJ