Without knowing more about it. I'll throw out a guess of Crank Position Sensor.
If this is a 87 model it has no crank sensor. All the ignition is in the nose cone unless it still has a control module, that said if the OP were to crank the engine to TDC, key on loosen the stand off screws on the sensor, ground #1 plug to the head and rotate the sensor you would see a spark IF the pick up were working
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