The reverse flow head was ideally suited to a production carbureted engine due to its low rpm performance and ease of manufacture. The design could be modified for high performance by porting (in particular siamese) and isolating the inlet manifold from the exhaust header.
The reverse flow head was ideal for use in a carbureted engine because of its excellent performance at low rpms and simple manufacturing process. This design could be enhanced for higher performance through porting, such as with siamese configurations, and by isolating the inlet manifold from the exhaust header.