Correct we don't know, but even with a mopar electronic ignition and say a msd blaster coil wouldn't the ballast have no purpose ? I always thought the ballast protected the older low voltage coils and points.
This gets sticky. "Ma" never intended for you/ us to play around with different coils. Aftermarket HP coils have different current requirements, and this "changes things"
At least one of the Accel and the old Mallory rectangular coil required a SECOND resistor IN SERIES with (in addition to) the factory resistor.
In the early 70's, I walked up to a kid with a 55 chev just in time to see one of the (then new) Mallory coils explode, oil all over the firewall and engine. he had not read the destructions, and had installed it by replacing the factory resistor (55 had a block resistor, not a wire) with the Mallory.
He'd left the key on for some reason, and the points obviously had been closed.
