Did they tell you how? The length of the lever on the carb will control how much cable movement is available between idle and WOT. But unless they make an adjustable linkage or arm with multiple holes, I don't see how you're supposed to adjust it..
He said "It sounds like your linkage is not at the correct 4'oclock position relative to the axis of rotation." Looking at my pictures and connection I think it is though. He also did not understand that with the lokar cable it pulls on the shifter lever instead of pushes on it. At first he told me there is no way it could pull the shifter lever...
