Can anyone figure this out

ignition was wired just like in the diagram. I just took it for about a 20 mile drive with the original points distributor in it. It surges at cruising speed, has a little bit of a dead spot off idle. I stood on it from a dead spot and it is a real pig off the line. I don't have a tach in the car but after about 3000rpm or so it starts to pull pretty good. It idled fine at every stop I made. I let it idle for awhile after I pulled it in the garage and it idled fine. I checked the vacuum earlier when I had the electronic ignition in it. It would not idle well but the vacuum gauge would go from 7 inches down to zero. When I would rev it a little the gauge would jump right up. I'll check it again tomorrow now that it idles with the original distributor.