Choke or generally too rich is right. It sounds like you have a stocko manifold too. I would wind the carb back a flat and see how you go. drive it to work and back and see what the plugs are like. Wind it back 1 flat at a time, you really don't want to go too lean. If you have a std manifold, think about an update, or take it to a tuner and get them to sort it out. Costs money but best way to get your car running at it's peak. I just had my clubby tuned and you wouldn't think that the thing had the herbs he has now!
Cheers
Aaron
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