Edelbrock SB Oldsmobile Performer RPM Cylinder Heads for Hydraulic Roller Cam

Intended for installation on 1965-1976 Small-Block Oldsmobile 350-403 c.i. engines equipped with a hydraulic roller camshaft, these 356-T6 aluminum casting cylinder heads (#61035) are a modern refinement to our #6051 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 PN 61025/61029’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 PN61025 and PN61029 for big-block specific cylinder heads.

Fitment

356-T6 Aluminum Casting, 68cc Combustion Chamber Volume, 200cc Intake Port Volume, 130cc Exhaust Port Volume, 2.072” intake and 1.680” exhaust valve sizes, 3/8” dia. Pushrod diameter, 5/8” Finished Deck Thickness

• 1973–1975 Oldsmobile Cutlass Base
• 1973–1977 Oldsmobile Cutlass S
• 1973–1977 Oldsmobile Cutlass Supreme Base
• 1973–1979 Oldsmobile Delta 88 Base
• 1973–1979 Oldsmobile Delta 88 Royale
• 1974–1975 Oldsmobile Cutlass Supreme Cruiser
• 1974–1975 Oldsmobile Vista Cruiser Base
• 1974–1976 Oldsmobile Omega Base
• 1975 Buick Apollo Base
• 1975 Buick Apollo SR
• 1975 Buick Century Luxus
• 1975 Buick LeSabre Base
• 1975 Chevrolet Bel Air Base
• 1975 Chevrolet Camaro Base
• 1975 Chevrolet Camaro LT
• 1975 Chevrolet Camaro RS
• 1975 Chevrolet Caprice Classic
• 1975 Chevrolet Caprice Classic Sport
• 1975 Chevrolet El Camino Base
• 1975 Chevrolet El Camino Classic
• 1975 Chevrolet Impala Base
• 1975 Chevrolet Impala Custom
• 1975 Chevrolet Impala Sport
• 1975 Chevrolet Monte Carlo S
• 1975 Chevrolet Nova Base
• 1975 Chevrolet Nova Custom
• 1975 Chevrolet Nova LN
• 1975 GMC Sprint Base
• 1975 GMC Sprint Classic
• 1975 GMC Sprint High Sierra

…and 60 more applications.

Specifications

Manufacturer part number

61035

UPC

085347610358

Shipping weight & size

35.70 lb, 25.9 × 11.3 × 8.1 in

Documents

• Installation Instructions

Notices

• Not legal for sale or use in California on pollution-controlled vehicles.
• WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
• Special order item — ships direct from the manufacturer; extended lead times may apply.