Refering to andys suggestion, you can make a trigger wheel from the same ford, as far as I can remember the timing pulley on the ford is 36 teeth, so one of these with one of the teeth filed or milled off gets you your encoder wheel, the ford original pickup comes off the flywheel, but as long as the pulley trigger wheel is steel or cast you can make a bracket for the pickup and use it that way, you just might need an adaptor ro fit the wheel to the end of the crank.
There are different versions of edis, but they are all reliable, I think its just the interface protocol that talks to the eec injector controller module that varies, edis modules will work stand alone without the eec connected, you would of course be runing with the edis escort or mondy ignition advance profile, it'll still work though.