He said it had a double pumper on it, changed the converter, the problem developed, and was told to take off the double pumper as that was the problem. The new carb didn't do away with the problem. So going back to a double pumper won't help it either. The only thing he did to the car, that most likely caused the problem, was the converter change = it's too tight a converter, and it won't let the engine get up into the torque range, so it bogs down and is doggy.