Back in Black Nighthawk LS (Part 2): Heads, Valvetrain, Oiling System & More
Editor’s Note: Mike Mavrigian’s shop, Birchwood Automotive, specializes in street performance and racing engines as well as vehicle restoration. We covered his last build, a 499 cubic inch Mopar 400 big block. This time, he’s building a 408-cubic-inch LS engine based on a 6.0L cast iron block. We covered the short block in Part One of the
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