According to the serial number you posted, your tractor has a front-mount distributor. These were an unusual Ford setup that used a dash-mounted resistor to drop the 6 Volt battery voltage (actually about 7.4 Volts running and charging) to some 4 Volts. Jumpering power "hot wiring" to the top, primary terminal on the coil WITHOUT an OEM (or equivalent) resistor in the primary circuit will RAPIDLY lead to overheating of the coil and breaker points and their untimely demise.
If someone has converted this tractor to 12 Volts in the past (as has often been done, even MORE resistance MAY be required, depending upon what coil was used. Even the so-called "12 Volt" coils need the OEM primary resistor in the circuit. If it is 12 Volt with an original-type coil, even MOLE primary resistance is required.
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