Designed for 1955-86 262-400 c.i.d. Chevy V8s for maximum power and a broad torque curve for high-performance street/marine. Provides power like a single-plane and throttle response like a dual-plane. Has provisions to add oil fill tube. No provisions for exhaust heated or stock-style choke. Accepts late-model waterneck, air-conditioning, alternator and H.E.I. Will fit cast iron Chevrolet Bowtie heads, but will not fit 1987 and later cast iron heads. Will not fit under stock Corvette hood.