9/10 volt drop from battery to resistor could indicate a corroded ignition switch or bad wiring.
The coil appears to be new. Are there markings on it such as "12 volt external resistor required" indicating that it needs the resistor or could it be a true 12 volt coil that needs no resistor? I've also seen 12 volt conversion kits with a resistor with too much resistance. It should be about 1 1/2 ohms
Output of coil to distributor should read near battery voltage with points open, near zero with points closed.
It also appears to me that the wires on top edge of alternator may be reversed. #2 on right should loop down to big output stud. #1 on left should connect to the ignition switch with a diode in the line to prevent engine continuing to run with switch turned off?
One check would be to disconnect wire from + side of coil and run temporary wire direct from battery + and see if you get spark. This will bypass switch, resistor and that section of wiring.