Hey, I just got one of these carbs and I am making my own Intake for my Briggs 5hp Flathead, I have one question. The little hole at the bottom center of the carb. flange that mounts to the intake. Do I have to drill a small hole in the intake flange to let air get to that hole, or can I just cover that when I connect it to the intake? Look at post number #5, first picture to see the hole that I am talking about. Any help is greatly apreciated. Thanks, Jason