Coil instullation

I bought and installed a MP electronic ignition on my 70 Dart with a 360. We broke the engine in and put the inner springs in the valves on the heads. We took the plugs out to put the air hose to keep the valves open. The plugs were black my friend adjusted the carb. and reset the timing. He said maybe a hotter coil would burn cleaner. I bought a 1.5 ohm Pertronix Flame-Thrower. The instructions say to remove the resistor. Is that a good idea? Can you us it with the resistor. Thank you for your help.

A ignition coil is a voltage transformer, it will only make the voltage high enough to jump the gap it sees at the time it fires, if it is idling with no load the voltage requirement will be much less than at wide open throttle above 5000 RPM Don't change the coil It will be a waste of effort and money

That coil doesnt use the resistor because it was
designed for full 12+ volts... if it says dont use
it... dont.... thats the same as MSD.. they dont use
a resistor either... but in MOST cases.. you have to
join the 2 resistor wires together so it fires both
during cranking and run
EDIT
If its firing and the plugs are hot enough then the
carb is most likely dog fat... could be multiple things