Wrong scoop for a '70. It would have the dual scoops, not the snorkle.
4-1/8" on the fresh air holes in the hood.
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The bumperettes do mount off a separate hole, not off the same location as the mounting brackets. You can see on my car where the bumperettes used to be from the wear marks on the chrome, I used an extra pair of bumper bolts to fill the holes. Cars without the bumperettes don't have holes there, they just have 4 bumper bolts that go through to the bumper brackets.
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