'Pick up the draft' means nothing literally, the carbs mount according to how the fuel bowl is kept level and that depends on the carb design. The float action direction changes up inside the bowls to be at the standard right angle to gravity to let the floats work right. There can easily be more than one degree of downdraft as the angles have been steadily changing to make the ports straighter over the years.
As well, if the carb bank was off another engine you may well have issues with the carb spacing too, not all are the same distance between carbs, and more fit issues.
You'd best show some pics there. Still wondering what 'RC' carbs are unless referring to RC Engineering.