Hey cant remember if its always been this was but I am starting to notice it a bit more maybe as I have been driving the Fagna to work ( the Lane has been pinched by the missus- she is addicted to the v8 sound):
When you ease on the throttle it seems to take a few seconds to kick into the motor, almost like its changing gear ( but its not). Done nearly all my work on carby cars where you touch the throttle the car revs instantly. Cant say it does it in neautral or park, so could this be electrical ( ecu) or maybe the box, or is this normal for the Nc's?

Check the TPS Voltages.

Look here for info on how to
ford-v8-f2/adjusting-base-idle-and-setting-t-p-s-voltage-t56990.html

Hope that helps

Brett