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I understand why you posted this, badging and advertising, but I believe the math works out to 425 cubic inches....and do you celebrate the 7th (litre or liter) of each month? 🤔
There are two ways to calculate Ford's "427", neither equal 427.4.233 x 3.78 = 425.5682 &4.234 x 3.784 = 426.2198