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The 446ci Mopar Wedge that’s currently in the car is a temporary engine that Mike Williams yanked from his ’68 GTX—but it’s still plenty potent. Built by the defunct B&B Performance & Machine, it cranks out 563 hp with ported iron heads, an M1 intake, a 1,000-cfm Barry Grant carb, and a mild .540-inch lift hydraulic cam. Nevertheless, Mike has a more powerful 512ci stroker in the wings. He also built the custom radiator shroud and hinged cover in his shop, and used Dupli-Color engine enamel and—get this—graphite wheel paint for the valve covers and intake.