Is hood insulation necessary?

The hood on the car in my avatar is an original 340 hood, though it's not original to the car, which started life with a 318. I have helped friends put these scoops on a regular flat hood before. Is there a question that I can help you with? If you need pics of an original hood with the holes, I have 2 of them in my shed that I can take pictures of without the scoops in the way. If you have a 70 or 71 flat hood it's really easy because there are places in the hood frame that locate about half of the mounting holes and the big hole through the hood.