The wing was not that tall so the trunk could open, it was that tall to get it up in to the "clean" air. One of the two guys that came up with the design said the trunk opening wasn't even a worry. It's an old wives tale, like the ducts over the fenders. The ducts where there to vent the air from the wheel wells, not to provide additional clearance for the tires like was told. Most likely these were believable white lies told by Ma Mopar as to not reveal the actual science and strategy behind the actual uses.