I have an 89 Raider with the 3.0 V6 that had much the same problem. The power unit is a transistor turned on by your ECU (computer). Pull the coil wire off the distributor cap and test for spark with a spark tester (got mine from Napa for not much money) if there is no spark at the coil, make sure the wires going to the ECU are intact and connected. The LC filter can cause a problem if they have shorted, but, you can by-pass them with the connectors in the wires leading to/from you coil and power unit. If the wires are intact and it's not the LC filter, you need to check your distributor for the proper signal. My distributor has an optical pick-up unit in it that sends a signal to your ECU telling it when to fire your power unit which makes the coil produce a spark at the right time. Good luck and just know that you are in for some wire tracing. There are alot of connectors that need to be checked in those wires. check them all for corrosion or broken wires.
Joe