you should have a vr type sensor on your crank it is basicly a magnet with a tiny copper wire wraped around it (2 inner wires) with a screened cable to stop rf interfearnce (1 wire around the out side) as the teeth pass the end of the magnet the flux is moved and a an ac voltage is made with a wave to match the teeth the ms or ecu looks for the point where v crosses the 0v point and uses this as its crank reff point.
with a multi meter in ohm setting you should get a conection between 2 of the wires around 0.5-1k thats your signel the screen should not be connected to the other 2
here is the tricky bit get the two signel wire the wrong way around (polarity) and the up is down so your sync or timing will be out at your missing tooth/teeth point
look here under vr's
http://www.msextra.com/doc/index.html
as for your coil if its wasted spark coil you will have 3 wires as basicly its two coils joined together
1 pin will be ign+ center pin on a ford coil iirc
the other 2 pins will be trigger- from the ms for cyl 1+4 and 2+3
a multi meter in ohms setting can be used again to find out whats what
the restence should be = from the ign+ pin to both the other 2 trigger pins with the highest restence from one trigger pin to the other.
wire it up and if you get your firing order wrong swap over the trigger wires or the 1+4 and 2+3 ht leads
if you forgot what ht lead point is what each pair should be conected
i hope you can understand it now