How about a "spoiler" on the leading edge at the front of the hood so it always puts pressure onto the hood like the spoiler flaps on an aircraft? Or tape the hood scoop opening because that's what I think "scoops" and mostly lifts it off along with air getting under the front edge of the hood. Had the hood come up on a box van down in Texas one time and that was right as I hit 60 MPH and had driven several miles. WAM!! broke and covered the windshield on a 2-lane country road with oncoming traffic and no place to pull onto the shoulder but a 6-foot drainage ditch and a foot of shoulder between the road and it. That was TERROR and a thrill.
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