Edelbrock Part # 2181 Performer 351W intake manifold is designed for street 351 c.i.d. Ford Windsor V8's. Will not fit Boss 351. Aftermarket 4-bbl carbs are not compatible with Ford Auto Overdrive Transmission (AOD) unless used with Lokar bracket SRK-4000. For more info call (865) 966-2269 or go to www.lokar.com. 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.