Ford 351 Engine Block N351 Cylinder Head
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In the foreground is a new N351 cast-iron cylinder head. Behind it is an older N351 head cast from the old tooling. As you can see, the changes are minor. The area around the lower head bolt holes has been beefed up slightly, and while the same headers will fit both heads it appears the exhaust flange on the newer head extends out slightly farther. View Related Article
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