Thats there is a Durspark Ignition Module made by FORD. Take a look at the plastic color where the wire enter the box. The color will tell you the actual specs of the box ? Durspark 1 or 2. Some have built in balast resistors and some need them added externally .. one thing I know for sure ..you need a Durspark/ Ford Coil.
The most desirable boxes have a RED relief color.
Ron
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