[2000mc]

I think you might be reading into the full grill block too hard. I think there are a lot of vehicles on here that might have a "full grill block", where the entire upper or lower grill is blocked, but one of the 2 is left partially open, or there is a gap in the body work, or at the edge of the hood that allows air flow. My grill is completely blocked, but it pulls air like the corvette pictured above. it's not that differnt or special from any other grill opening, it's just not surrounded by body work on all sides, it still uses some amount of frontal area to grab air to direct through the radiator.