68 Barracuda Hood

Or you could do what I did;
Remove the inserts and gaskets, and cut out all the parts that lie inside the stud-line, leaving some supportworks. Then elevate the inserts with spacers,(I used short sections of vacuum hose), and re-install the inserts without the gaskets.
I got about a half inch airgap. With a perimeter of around 56" IIRC, times two, that totals 56 sq inches, nearly 6 times the area of the throttle valves of my 750DP.Then I built a box between the carb air-horn and the underside of the hood and sealed it all up.

At a later date, I cut a 5 or 6 inch hole in the hood and mounted a small oval aluminum bodied air filter housing on top of the hood (I'm guessing about 7x14) and sealed it to the hood with a V-belt so it's about a half inch up off the hood. The aluminum air filter house has a lip all round it also about 3/8 inch so in total, the filter is nearly 1" up off the hood. I use a filter about 2.25" tall, again guessing. Then I built a different box to seal that hole to the carb. The previous holes are now venting hot underhood air.
I haven't had any negative comments about it, and I wouldn't care if I did. But by the same token, most comments are like: "interesting"....... so IMO that is a thinly veiled negative comment.
But it does everything I had hoped it would...... except in the rain I swap out the pleated paper element for an oiled-cloth KnN.

BTW, the engine is not in the center of the bay, but the filter is in the center of the hood, from left to right. The offset is about 1 inch, no big deal.
There is a company that will sell you a big housing and some hoses and such; so you can build a RamAir or cowl induction system, under the hood. I think they are called RamAir,lol.