CYL HEAD SB OLDSMOBILE PERF RPM FOR HYD FLAT TAPPET COMPLETE

Intended for installation on 1965-1976 Small-Block Oldsmobile 350-403 c.i. engines equipped with a flat tappet camshaft, these 356-T6 aluminum casting cylinder heads (PN61039) are a modern refinement to our PN6051 heads, except they can accommodate a factory-style mechanical fuel pump. A smaller 68 cc combustion chamber achieves a more appropriate small block compression ratio compared to our PN61025/61029’s larger 77 cc chamber, which yields a lower compression ratio than most engine builders desire on a small block engine. These heads require a 3.9375” minimum bore and feature a modern chamber design with optimized spark plug positioning. Maximum airflow is achieved through the factory 6-degree valve angle using high-flow 200 cc intake and 130 cc exhaust port volumes, along with 2.072” intake and 1.680” exhaust valve sizes in their O.E. positions. A finished deck thickness with added material above the intake port and pre-counterbored head-bolt holes for .5” diameter studs provide extra clamping force in key areas. A stud-and-guide plate valvetrain system (as opposed to the O.E. pedestal type) provides a solid foundation for the beefier diameter pushrods, and Helicoil inserts in the exhaust and rocker stud holes keep bolts secured. However, there are no provisions for a heat crossover. Although these heads will fit on Big-Block Oldsmobile engines, the 68-cc combustion chamber size is not ideal for a big-block application as it will raise compression. See PN 61025 and PN 61029 for big-block specific cylinder heads.

• Factory 6-degree valve angle
• Maximum compatibility with OEM and aftermarket components
• Mechanical Fuel Pump Clearance Cutout
• Allows the use of an "OEM" style mechanical fuel pump
• OEM Port Locations
• Retains compatibility with OEM and popular aftermarket manifolds and Headers

Vehicle Specific

• Small Block Oldsmobile 260 thru 403 CID. Can also be used on some low compression Big Block applications

Attributes:

• Brand Name: Edelbrock
• GTIN: 00085347610396
• CNC Machined Exhaust Port: No
• CNC Machined Intake Port: No
• CNC-Machined Combustion Chamber: No
• CNC-Machined Intake Runner: No
• Combustion Chamber Volume: 68
• Cross sell / Upsell Part Numbers: 311105 - Super StreetFighter TH350 6" Tailshaft Non Lock-Up (Buick/Oldsmobile/Pontiac) K42-222-4 - Xtreme Energy 218/224 Hydraulic Flat Cam K-Kit for Oldsmobile 260-455
• Cylinder Head Gasket Included: No
• Cylinder Head Style: Assembled
• Exhaust Port Location: Standard
• Exhaust Port Shape: Square
• Exhaust Runner Volume: 130
• Exhaust Valve Angle: 6
• Exhaust Valve Diameter: 1.680
• Exhaust Valve Job Diameter: 1.680
• Exhaust Valve Stem Diameter: 11/32
• Guide Plates Included: Yes
• Guide plate Pushrod Size: 3/8
• Intake Port Location: Standard
• Intake Port Shape: Rectangle
• Intake Runner Volume: 200
• Intake Valve Angle: 6
• Intake Valve Diameter: 2.15
• Intake Valve Job Diameter: 2.15
• Intake Valve Stem Diameter: 11/32
• Material: Aluminum
• Quantity: Single
• Related Products: 2156 - Performer Intake Manifold for 1965-79 Pontiac 326-455 Non-EGR 7156 - Performer RPM Pontiac 326-455 Intake Manifold 7373 - Engine Gasket Set (Head / Intake / Exhaust / Valve Cover) for Oldsmobile 4485 - Signature Series Valve Covers for Oldsmobile 350-455 V8 3712 - Performer-Plus Camshaft Kit for Small-Block Oldsmobile 350-403 V8 22764 - Edelbrock Max-Fire Distributor for Oldsmobile 260-455 V8 85582 - Edelbrock E-Series Cylinder Head Bolt Kit 85582 for Oldsmobile big-block 3113KT - Adjustable Double Roller Timing Set for Oldsmobile 400-455
• Required Products: 7340 - Cylinder Head Gasket Set for Oldsmobile 7238 - Exhaust Manifold Gasket Set for Oldsmobile 7284 - Intake Manifold Gasket for 1965-76 400-425-455 Oldsmobile engines 7598 - Valve Cover Gasket Set for Oldsmobile
• Retainer Diameter: 1.055
• Retainer Lock Style: 7
• Retainer Material: Steel
• Rocker Arm Studs/Bolts Included: Yes
• Steam Holes Drilled: No
• Valve Cover Mounting Style: Perimeter Bolt
• Valve Guide Diameter: .545
• Valve Guide Material: Manganese Bronze
• Valve Guide Size O.D: .545
• Valve Lock Material: Steel
• Valve Lock Style: Single Groove
• Valve Locks Included: Yes
• Valve Spring Maximum Lift: .600
• Valve Spring Type: Beehive
• Valve Springs Included: Yes

Extended Information:

• Country of Origin: US
• Emissions : Racing or Pre-Emissions Use Only

Packing Information:

• Quantity of Each: 1
• Package UOM: EA
• Dimension: 25.9 x 11.3 x 8.1 inches
• Weight: 35.7 POUNDS

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