69 340 problems

George, just read your post about the spark test at the coil today. If you have good spark at the coil we just have to figure out why it ain't making it to the plugs. Spark at the coil also means the points, the ballast, and the rest of the electrics are doing their job. The only things that can diminish spark energy between the coil and the plugs are the coil wire, rotor, plug wires, and the distributor cap. We can eliminate the cap since you have tried 2 different ones with no effect. Doubt that 8 plug wires would go bad at the same time.