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You could put a scoop just like the carburetor scoop on the bottom front of the Zero's cowling, but invert it to the top of the radiator surround. The rounded contours of both are close.
Or take the oil cooler scoop design from the bottom rear of the Zero cowling, put it on the hood.
Did they ?
I'm looking on 2nd picture and colour on the low part of the wings is not green, it is much lighter. But it doesnt really matter, from the comments I've read the amount of detail they put into movie is really astonishing.
View attachment 505327 View attachment 505328 View attachment 505329 So you could look for yourself, if you want.