No I don't believe the carb is loading up. It don't feel like that because as soon as you let off the brake and hit the gas it goes. Maybe a vacuum leak, I can check for that tomorrow. I don't think Eddy's have power valves do they?
No power valve on the Eddy. That function is controlled by a spring. I doubt that's your issue as the stock setting should be able to handle your setup.
If there's no vacuum leak, i'd have to go with a timing issue or a bad converter, like has been mentioned earlier.