BTW, you either need to plug the extra heat riser inlet port on the bottom of the new snorkel, or connect up a second heat stove on that side. Don't leave it open, or in cold weather the carb will be slow to come up to temp, and performance and mileage will suffer.
You can just cork it up, but you do need to hook up vacuum to the second air door vacuum motor. Once the carb temp comes up, both air doors will open for the cold air induction tubes. Most of the factory double-snorkel air cleaners had the heat stove on one side only, though both sides had the vacuum door to close off cold outside air until the carb heats up.