Edelbrock part #2750 Performer 351-2V intake manifold is designed for street 351C and accepts 4V carb, however it's designed to improve the performance of engines that came stock with 2V carb and heads. Manifold will fit Boss 302 or accept stock Motorcraft spread-bore carb. End-seal flange width measures 6-31/32". Edelbrock's Patented Dual-plane, low-rise design with a 180-degree firing order greatly improves torque over a wide rpm range for excellent throttle response from off-idle through 5500rpm. This Performer intake manifold is ideal for passenger cars, trucks, 4x4s, tow vehicles and RVs.