Edelbrock Valve Cover Chevy for Big Victor HeadThe Edelbrock #4259 Aluminum Valve Cover is designed especially for the Edelbrock big block Chevrolet Big Victor Spread Port CNC 405 cylinder heads #614468, #617569, #618269, #618368 and #614468. These heavy duty sand cast aluminum valve covers are designed to provide additional clearance to the Jesel rocker arm set up when used on our Big Victor Spread Port cylinder heads. No provision for breather hole has been machined to allow for custom plumbing