I like it! If you had another hood and an accurate temp gauge you could very easily determine whether it had a negative Impact on highway engine temps, eh?

I used an 80s Chrysler hood vent on my 3rd gen I, in the interest of reducing underhood temps by the battery. I didn't notice any increase in running temps, but this is based on the stock gauge, so I can't say for sure... I agree though, a louvre might give you the best of both worlds.

1991 HZJ77, 1999 KZJ90, 1999 UZJ100, 1992 M101CDN2
https://www.thegearheadproject.com/category/jdm-journeys/