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Don't want to rain on your parade, but those are resistor plugs and the resistors on that system are in the connectors already,.. you are doubling up on secondary resistance with them, and don't forget, these systems are 2 plug series circuit, so you are now adding two more resistors to the circuit.

I would not worry about the coils being changed if they ohm out good and uniform as much as i would worry about using Resistor plugs
Do a search on these and you will see testomonies that using the cheapo F8DC4 coppers are the best for 104 w/waste spark systems ..
.8mm [.032] setting/gap