Anyone ever cut a vented "heat extractor" fiberglass hood?

Yeah theres tons of drop in ones from fiberglass, aluminum and even carbon fiber ones, just google search universal hood vents. Been thinking of it myself, alot position them over exhaust to help draw out the heat as well as the air from under good, well if you have a hood scoop just seal it to the carb and run hood vents for all the heat. The company that did my dash insert makes vents out of aluminum.