Craftsmanship on this thread is very nice.
On Op's? solution with that ducted, internal air flow, it would concern me. I'd love to see an IR camera record heat distribution across the radiator at speed.
I have never been a big fan of Nascar style cowl inlet, felt it was compromise by Nascar to maintain a stock look.
This is my solution to this issue, not shown I believe is an under hood horizontal CF panel that separates intake air flow from rad air.

https://board.moparts.org/ubbthreads/ubbthreads.php/ubb/showflat/Number/2730519/Searchpage/1/Main/137322/Words/%2B62+%2BPolara+%2B500+%2BCruiser+%2B55/Search/true/re-62-polara-500-cruiser.html#Post2730519

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.