I have tested the plug wires with a multi meter. tested 2 from each side of the engine. No luck. This weekend I am going to use PDF from the elc. page "No Spark on Your Stovebolt" and go through those steps and see what the test light shows. If that checks out, there was also a post in the elc. forum from Bill Hanlon that had some other tests to check. With the age of the truck I am leaning towards the coil wire coming out of the distributor. Not sure how much chafe protection is at that point. Will update Saturday afternoon.