Designed for 1961-78 Chrysler 361-440 cid wedge engines, these heads bolt on for big performance gains. These heads flow 291 cfm (intake) and 214 (exhaust) at .600'' lift. Features include 84cc or 88cc combustion chambers, angled spark plugs and 1-piece stainless steel 2.14'' intake and 1.81'' exhaust valves. Heat treated, machined steel retainers and valve locks along with heavy duty valve springs for up to .600'' lift cams when used with 1.5 ratio rocker arms. The heat treated aluminum casting with phosphor-bronze valve guides, interlocking ductile iron valve seats, 2-ring stem seals and heli-coiled bolt holes offers superior quality typical of all Edelbrock heads. Intake flange, bolt holes, valve cover and rocker shafts are all in the stock locations. Use head bolt kit #350-8591.