I had a Ferguson TO-35 a few years back come here for a no-start/no-spark - very similar to the 2/9N Fords. Someone found a new ignition coil for it and threw it in, which then toasted the points to a cinder.
Primary resistance needs to be correct - they grabbed a coil with very low resistance, so the sparking was so bad the condenser couldn't handle it either. I bought new points, condenser, cap, rotor, & hooked up the old coil that was still bolted to the block. Been starting & running flawlessly every day since.