Re: Nothing but bloody problems....
Bit hard to diagnose over the 'net..... but, here goes.
1. Falcons have a reisitor wire built in to the harness. It is the red "spongy" one. Works the same as a ballast resistor. If you have put an electronic ignition in (you said 'coil in the cap'), then this wire will not allow enough voltage through. But, the car should still wind over.
2. The starter solenoid should have 4 terminals on it. One is already hooked up to the starter with a small copper strap. His mate is the one the battery lead goes on (these two are pretty obvious, I know...). Then, there are two small terminals. One is the start signal (red and blue wire), and the other is the bypass circuit, which bypasses the resistor wire (mentioned above) during starting (brown wire). If you have the two small wires on the wrong way it won't wind over.
SO, problem #1, get rid of the resistor wire if you have elec ign.
problem #2, swap the wires around and try it.