Bad spark?

To continue 67Dart273's comments, hook the spark plug direct to the wire coming out of the coil. That takes the spark distribution out of the picture. You should see 4 strong sparks per revolution. If so, the ignition part is good and you have a problem with "spark distribution", which could be due to cracked cap, "wrong timing", "rotor mis-phased".

Once you get it idling, you need a timing light to go further, or just advance until it runs best (fastest speed or lowest vacuum), then retard it a bit if you get pinging on hills.