EDELBROCK

Cylinder head specifications: combustion chamber volume: 118 cc, intake runner volume: 315 cc, exhaust runner volume: 110 cc, intake valve diameter: 2.19 in., exhaust valve diameter: 1.88 in., valve stem diameter: 11/32 in., valve guides: manganese bronze, deck thickness: 9/16 in., valve spring diameter: 1.55 in., valve spring maximum lift: .700 in., rocker stud: 7/16 in., guideplate: hardened steel, pushrod diameter: 3/8 in., valve angle: 26 Deg., exhaust port location: stock, spark plug fitment: 14 mmx 3/4 reach, gasket seat. Installation note: bare heads will have valve guides & seats installed, but will require final sizing & a valve job to match the valves you will be using. Recommended spark plugs are champion rc12yc or equivalent 14 mmx 3/4 in. reach w/ flat gasket seat. All performer & performer rpm big-block chevy heads: spark plug is closer to center of bore, will interfere w/ high-dome pistons for open chamber heads. Use pistons designed for our heads. Match w/ Edelbrock head gasket sets.