With electronic ignition it likely would not aid in starting, and would be a good chance it would let the smoke out of the ignition module.
The resistor is used to limit current through a 6 volt coil on 12 volt system. If you bypass the resistor you will increase current through coil and the electronic ignition module. The increased current is likely to fry the ignition module. Also the original U switch and starter had no provision for the bypass wire.
If it were mine, I would replace the 6 volt coil and resistor with a direct 12 volt coil (NAPA IC14SB or equivalent) and eliminate a potential trouble spot.
Super Duper high energy coil will be of little or no added benetit on a 4 cylinder low RPM tractor.