Hi Frank,
With a dizzy I have set up the stock dry coil and ignitor. Since MS does not switch power to the ignition the way the factory does you want to provide the ignition and any 12 volt sensors power from the same circuit that feeds the MS.
The trigger wiring gets 12 volt power will just needs a 5 volt pullup internally fed directly to the main chip with a 1K protection resistor,this means there is no VR or Opto circuit.
With the MS2 the rising / falling of the trigger is selected in the sofware making this part very easy.
The output gets a 5 Volt pullup when using the stock ignitor.