{"product_id":"cyl-head-sb-oldsmobile-perf-rpm-for-hyd-roller-cam-complete","title":"Edelbrock SB Oldsmobile Performer RPM Cylinder Heads for Hydraulic Roller Cam","description":"\u003cp\u003e\u003cb\u003ePart #:\u003c\/b\u003e 61035\u003c\/p\u003e\u003cp\u003eIntended 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.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFactory 6-degree valve angle\u003c\/li\u003e\n\u003cli\u003eMaximum compatibility with OEM and aftermarket components\u003c\/li\u003e\n\u003cli\u003eMechanical Fuel Pump Clearance Cutout\u003c\/li\u003e\n\u003cli\u003eAllows the use of an \"OEM\" style mechanical fuel pump\u003c\/li\u003e\n\u003cli\u003eOEM Port Locations\u003c\/li\u003e\n\u003cli\u003eRetains compatibility with OEM and popular aftermarket manifolds and Headers\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor 350-403 c.i. Olds engines with a hydraulic roller cam, these heads are made of 356-T6 aluminum and feature 68 cc chambers, high-flow 200 cc intake and 130 cc exhaust port volumes, and 2.072\" intake and 1.680\" exhaust valve sizes.\u003c\/p\u003e\u003cp\u003eThis product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.\u003c\/p\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":51793433461048,"sku":"E003 61035","price":1400.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/horsepower-asset-11569751-6525834-square.webp?v=1774561143","url":"https:\/\/store.motormia.co\/products\/cyl-head-sb-oldsmobile-perf-rpm-for-hyd-roller-cam-complete","provider":"MOTORMIA","version":"1.0","type":"link"}