I would add that it is recommended that the resistor exist near the
arc (spark plug). So, the resistor spark plugs are the best location
for a resistor to suppress radio interference.
Giving up the resistor(s) in the rotor and plug wires then using
resistor plugs would seem to provide the best radio noise suppression.
Here's a good write up for anyone interested:
http://www.oldcitypublishing.com/Ful...xt/Klimiec.pdf