I looked at some carbon hoods. There is one out of Japan that has functional vents but is $2k.
This took me a day and a half to install and I consider myself a novice sheet-metal worker/fabricator. Took my time.
Will post the results. Held off on the oil cooler install to see the results of the hood vents (Still doing an oil cooler) Planning on placing a temp strip on my ABS pump to gauge under hood temps. Should have done so before the install to get a before and after.
You can just tape off the vents to get a before and after.