Was it actually 105mm all the way through? I know you said you needed to measure the throttle blade. You were also dealing with a snout that isn't 105mm. My thought lets say the snout was 109mm and the 105mm and 100mm are what they say I would think the difference would be very small.
My car is flowing way more with the pulley and I could test the stock and BBK being I have one but Jon's car has a stock throttle body because Simon said there was no power with a bigger one. That 2.7 is flowing way more air then mine.