This statement (highlighted below) is incorrect. On negative earth cars the distributor (i.e. the earth supply to the coil) should be connected to the - terminal, and the 12v ignition feed (the positive supply to the coil) to the + terminal.
This statement (highlighted below) is incorrect. On negative earth cars the distributor (i.e. the earth supply to the coil) should be connected to the - terminal, and the 12v ignition feed (the positive supply to the coil) to the + terminal.