Mopar electronic ignition with 1.5 ohm flame thrower coil

IIRC the removal of the ballast applies ONLY for when you use that coil with their Ignitor system.
That would make sense.
The Ignitor system probably incorporates current control to the coil. HEI modules do that too.

More is not always better. Most of the tricks related to coils are used to overcome the problems with racing. At high rpms (5000 plus) traditional igntions don't have enough don't have enough time to bring the coil's induced field to maximum strength. Longer dwell, higher voltage, different coil ratios are all in the bag tricks for drag racing.

All the engine needs is enough spark voltage to jump the gap of the spark plug, and then enough current to grow the kernel. The rest of the burn is on its own.
Flowing more electricity through a coil than needed just makes it hotter.
A ballast resistor or reistor wire was the simple way to match and control the electricity.
HEI, and much later EEC, had current limiting electronic circuits.