409 Chevy Engine - 481-Inch 409 Stroker
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Before the 454 crank can go into the 409 block, the mains must be turned down 0.250 inch, from 2.748 to 2.498 inches. The pen points to the shadow left after the 11/44-inch-diameter reduction. Notice the gentle radius transition from journal to cheek that eliminates stress risers common to 90-degree parting lines. Crankshaft strength is not compromised. View Related Article
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