Mervin, I still have the OEM coil where it was originally mounted.
Here is where the change is made.
The coil wire from the OEM coil plugs into the Jacob's Interceptor Module.
A second coil wire comes from the Omni Magnum Unit to the coil position of the distributor cap.
This is where the ignition system from Jacob's inputs their high, constantly variable(depending on the resistance of each spark plug) secondary voltage.
To increase the secondary output of the triggerring coil would have no effect upon the output of the Omni Magnum's coils.
You could use a high performance coil as a trigger, but it would have no added output from the internal coils of the Magnum.
A plus feature of the Jacob's product is, should the Jacob's unit fail(pray NO), you simply return the original coil wire from the coil to the distributor cap and you're off running again, Stock ignition.
In reading all of the comments relative to using a higher output coil, a coil is a coil is a coil.
I see nothing special about the OEM coil.
The name of the game in coils is the turns ratio between the primary to secondary windings and the cooling media.
To add that higher output coil in hopes of more output from the Jacob's, NOPE.
Happy Trails Beep Beep from long winded Houston!!!
Donald, El Cheapo