With the new Performer RPM E-Boss 302 manifold, you can build a mock Boss engine by using a standard 302 block and Performer RPM Cleveland cylinder heads #61699. For high-performance street and competition, our dual-plane design makes outstanding power from 1500 to 6500 rpm. The Cleveland port layout and intake bolt hole pattern fit both 2V and 4V heads. Features include 8.2" deck height, Windsor end rails, water neck and distributor clearance plus front and rear water bosses. Match with an Edelbrock Performer or Thunder Series AVS carburetor. Will not fit OE Boss 302 engines.