Understood what you're thinking on the vane for the radiator but not really concerned since it literally could not run cooler. (and that doesn't exist on any oem bottom feeder shrouds that I've seen)

As for the cowl induction I'm thinking if the base of the windshield is a high pressure area, allowing the engine to ingest that pressure lowers vehicle drag.

Polara induction looks like it would work great and I considered pulling from the grill as well but ultimately wanted to keep the aesthetics more stock (ish)