The oil pan for 351W engines is a great street manifold for this engine. 

It provides good top end power without sacrificing bottom end torque. 

Its long runner, dual plane design provides the best of both worlds. 

This manifold performs best with an aggressive street cam. 

For street, use a 600-750 CFM vacuum secondary or double pumper carburetor.

For competition, use a 750-850 double pumper carb. One major feature on this manifold not found on competitive models is a rear water crossover passage which promotes a cooler running engine.