I haven't checked the spark yet. I'll do that today. And I agree about the running it in the driveway bit. I did not replace the points when I replaced the resistor. Today, I'll have a good look inside the distributor. Seems like this truck has an inexhaustible supply of curveballs it can throw at me. The vacuum advance was pretty much the last piece of old equipment under the hood. Everything else has been replaced or rebuilt. Except the distributor. My money is on bad points/condenser but I'm thinking I should take the whole thing apart and check the bushings and mechanical advance as well.
