The coil does send the spark to the dizzy.
The way ignition systems work, is 12v is transformed into several thousands of volts (by the coil), which is basically like a mains transformer. Something has to make and break the circuit to the LT (Low Tension) side of the coil, in order to produce a fake kind of AC voltage (for instance a mains transformer can only work from AC voltages), this then produces a high voltage (Stepping up voltages steps down current in a proportional ratio, and vice versa) on the HT (High Tension) side of the coil, to produce sparks.
So, basically, the distributor on your car, inside, has a sensor in 12v LT side, which produces signals for each of the 4 sparks, which creates high voltages on the HT side of the coil, which then connects onto the end of the distributor, and is distributed to each cylinder in the desired order by means of the rotor arm (which spins inside the distributor cap).
Sorry if thats still to technical to understand?
If it is your problem its easy peasy to fix, obiously when fitting the new one fit it in the same place as it should be relatively close to how it is set now (if your lucky it might be spot on), then its literally a case of run the car up to temperature, connect a timing gun onto the car, disconnect the vacuum pipe from the ECU, tap in the desired timing into the gun, point it at the bottom pully on the engine, and you should a little notch in the pulley wheel against the number marks on the bottom cam belt cover section, which should be inline with the "0", if not adjust the dizzy a bit at a time until it is. When you get it there, tighten the dizzy, re-connect the vacuum pipe to the ecu, and the jobs a good un
That may seem a lot, but once you've done it you will realise how simple it is, if you say you have a haynes manual, that will also tell you what to do, with some diagrams!
Or, ultimately, buy a new sensor to go in the dizzy, and then you wont even need to disturb it, it can stay on the head! (Thats what i would do personally
) Plus the fact the modified ones dont have all the wires running inside the dizzy, one compact unit, and wire free
