I've done something like that with the 80's mustangs where you bypass the coolant going to the throttle plate. yes it gives you a bit more power but when the temp hits below 34F on a day with high humidity the Idle Speed controller and throttle plate freeze up as the air going into the intake tube will drop in temp and cause ice to form before it goes into the engine. I've also had Chevette's with the 2BBL's freeze up when the lower heating element was removed. Granted the intake temp should be above freezing but with the venturi effect the air going into the carb is cooled down well below freezing before it goes into the intake and gets warmed up again. Think of it this way.... open a window in your house and put a big fan in the window at or around freezing,Turn the furnace up to 100 degrees then let the fan run and see how much ice forms on the fan blades this is basically what's happening with the carb. By passing it is fine in cool to warm conditions but in the winter you reattach the lines and you will be fine.