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Cylinder Head Specifications: Combustion chamber volume: 77cc; Intake runner volume: 188cc; Exhaust runner volume: 106cc; Intake valve diameter: 2.072"; Exhaust valve diameter: 1.68"; Valve stem diameter: 11/32"; Valve guides: Manganese bronze; Deck thickness: 5/8"; Valve spring diameter: 1.46"; Valve spring maximum lift: .575"; Rocker stud: 7/16"; Guideplate: Hardended steel; Pushrod diameter: 3/8"; Valve angle: 6°; Exhaust port location: Stock; Spark plug fitment: 14mm x 3/4 reach, gasket seat. INSTALLATION NOTE: Head bolt holes drilled for stock 7/16" bolts, but can be easily modified for 1/2" bolts or studs by drilling the 1/2" counter bore. Aftermarket 7/16"-stud rocker arms and 3/8" hardened pushrods required. Will fit 350-403 Olds with Edelbrock manifold #7111 only (port matching required). Match with Edelbrock head gasket sets. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 3/8" (width of slot in guide plate). Designed for high-performance non-emission 1965-76 Olds 400, 425 and 455 c.i.d. V8's. eart shaped chamber for a more efficient burn, outstanding horsepower and torque. Valvetrain has been upgraded from the factory pedestal-mount system to a 7/16" screw-in stud and 3/8" pushrod-slot guideplate for increased valvetrain stability. 60517 is not port matched or bowl blended and is NHRA-accepted for Super Stock (except 1968-1969 W-30) only. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 3/8" (width of slot in guide plate). Head bolt holes drilled for stock 7/16" bolts, but can be easily modified for 1/2" bolts or studs by drilling the 1/2" counter bore. Aftermarket 7/16"-stud rocker arms and 3/8" hardened pushrods required. Replacement valve part numbers are for sets of 8.
|Cylinder Head Type||Standard|
|Engine Make/Size||Olds 400-455|
|Engine Make/Size||Olds 350-403|
|Preparation||Bolt On (Not Required)|
*Some manufacturer restrictions apply.
Founded in 1938, Torrance-based Edelbrock, LLC is recognized as one of the nation’s premier designers, manufacturers and distributor of performance replacement parts for the automotive aftermarket. Edelbrock produces their core products in the United States of America using state-of-the-art equipment in their world class manufacturing facilities. Edelbrock, LLC encompasses five locations in Southern California and one location in North Carolina totaling more than 500,000 square feet.
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