The car is garage kept, and I had the air filter off when changing the points, even had it running without the filter in the garage, so that's not a problem. The carb was rebuilt about a year or two ago. I don't think it's a fuel problem. I had a similar problem last year but it was cured with wires. The points were just old and due for a change. I do have a mallory coil on there. Unless the HO coil is burning up plug wires, but they are good quality belden wires, with maybe 1,000 miles on them, so I doubt they are bad.

I'll check them out, maybe I'll have to upgrade to performance wires. All connections are tight.