[Christ]

Turn the idle down on the carb. There's a dashpot valve that expects a certain vacuum to operate correctly (unless it's the electronic version, can't remember) and is set to basically keep an idle speed under an expected load. You've removed a huge load from the engine, so it's bound to spin faster now.

Welcome to the joys of ecomodding.

There is also a chance that the electric choke isn't opening properly due to lack of proper voltage. You can check this by removing the filter pan and pinning the choke open with the engine warm. If the choke valve is already open, there's no problem there.

Check all the 200 feet of vacuum lines by shooting ether (starting fluid) or carb cleaner at them. Ether will make the engine race, carb cleaner will make it stumble. Watch as you soak the lines, any vacuum leaks will dry up quickly right around the leak, and this can also be a partial cause of your problem.

A few rudimentary checks, then report back and we can go from there.