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I think you may have several problems. Iagree with the post that says you may havean air leak around the carb metering section. that's common when you work on the intake maifold or remove the carb. The carb to intake manifold and the intake manifold to cylinder head connections can leak causing a lean mixture. The other sources are the worn throttle shaft seals or a cracked manifold. When you get the engine running, CAREFULLY spary some starter fluid around the spots I mentioned above with the engine running and when the rpm increases, you've found the leak. Fix it ASAP because a lean mixture in this engine can cause burned exhaust valves. You said you replaced the coil. Do you have a 6V or 12 V electrical system? If you have a 12V system did you make sure that you got a real 12V coil?(Like NAPA IC-14SB). There are 12V coils out there that are really 6V coils that have some fine print about the requirement for an external resistor that must be used with them. Is you got one of these and didn't put the resistor in series then you could have burned out the coil. The other thing to make sure to check is the coil connections. The small wire running from the coil to the distributor should have a connection that is the same as the polarity of the battery ground., i.e if your battery has a negative ground, that small wire running to the distributor should be hooked to the (-) terminal.
If that isn't the case, pull the wire out of the center of the distributor cap, hold it near a good ground, and try a start. You should see a FAT, BLUISH-WHITE SPARK. If you don't there is a problem with your primary ignition circuit that you'll need to sort out. Could be a bad connection, broken wire corroded component, burned points(due to a 6V coil on a 12V system with no ballast resistor!), etc. Hope this helps you.
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