Chevrolet Performance 12363420 - High-Rise Intake Manifold Oval-Port

• Designed for all 396-502 engines with GM aluminum heads (1975 and earlier) and large oval-port iron heads • Has a dual-plane design with spread bore flange and a dual-bolt pattern • Has no provisions for a hot-air choke, but will accept a divorced choke or electric choke • Accepts air conditioning and alternator brackets • Use intake manifold gasket P/N 12366985 and bolt kit P/N 12367959