One fuel filter, located on the firewall and to the right of the battery:
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Remove the plugs and coat the porcelein and end going to the spark plug wire with a light coating of dielectric grease. Liberally, coat the spark plug wire connectors going inside the distributor cap with dielectric grease. This should stop the misfires. Ensure all connections are completely seated.
The Variable Speed Sensor (VSS) may have been shorted out. Because of its location on the transmission, next to the firewall, it's easy to see how. Simple job to remove two machine screws and replace.