OK, I've had some time to road test the car since the tune-up and all seems very well. The old distributor cap was worn down and corroded like you wouldn't believe. The car now runs smoother, and the problem I was having with the car not being able to re-start after warm up seems to have disappeared. It also idles about 50-100 RPMs higher. Good news indeed. Should have done this at the first sign of problems but didn't want to just throw parts at the problem. One should replace the ignition parts on a used car anyway, just to obtain a zero point or benchmark. Now...on to the horn ring and brushes...
Thom