Orange spark is a sign of weak spark it should be blue,If the spark is weal like that you can find that in the engine under compression it is actually too weak to fire the plugs.

I would seriously hook up a multimeter and make sure that there is 12 volts everywhere it is needed, It sounds like it is only getting the 7 volt ballast feed and it likely needs 12 volts not 7 volts.

The Original setup with points ran a special coil at 7 volts when running and when starting the start circuit supplied 12 volts to boost the spark for start duties then when the Ignition switch was turned back to the run position it supplied 7 volts, So there should be a 12 volt supply when cranking and a 7 volt supply for the run position of the ignition switch.

I think that aside from the earth on the ignition module on the side of that Bosch Distributor which is vital as even getting the module damp can kill spark the problem will likely be voltage feed related, Remember 12 volts when cranking and 7 volts with ignition in the on position at the Coil and the Module uses the same coil fed voltage the points did.