The Gladiator comes with a soft top. You pay good money to remove it and install a hard top. Then you pay more good money to remove part of the hard top and install a soft top. Then you pay more good money to use a different soft top for when you fold back the soft top that replaced the hard top...
NASCAR teams have inducted from the cowl for decades. GM offered cowl induction on Camaros and Chevelles. Camaros had two different styles. The data is available. Common sense also says that's the case, as air cannot easily move out of that area, especially on something as boxy as a Wrangler or...
It's the other way around. The base of the windshield is a high pressure area, not a negative one. Air stacks up in that area. That's why cowl induction intakes work well.