{"product_id":"edelbrock-61039","title":"Edelbrock 61039 - SB Oldsmobile Performer RPM Cylinder Heads for Hydraulic Flat Tappet","description":"\u003cp\u003eEdelbrock 61039 - SB Oldsmobile Performer RPM Cylinder Heads for Hydraulic Flat Tappet\u003c\/p\u003e\u003cp\u003eCylinder Head - Performer RPM - Assembled - 2.150 \/ 1.680 in Valves - 200 cc Intake - 68 cc Chamber - 1.450 in Springs - Aluminum - Oldsmobile V8 - Each\u003c\/p\u003e\u003cp\u003eFor 350-403 c.i. Olds engines with a flat tappet cam, these heads are made of 356-T6 aluminum with 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\u003eIntended 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.\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\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Stem Diameter\u003c\/strong\u003e: \u003cspan\u003e11\/32\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGuide plate Pushrod Size\u003c\/strong\u003e: \u003cspan\u003e3\/8\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Stem Diameter\u003c\/strong\u003e: \u003cspan\u003e11\/32\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Lock Material\u003c\/strong\u003e: \u003cspan\u003eSteel\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAssembled\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRequired Products\u003c\/strong\u003e: \u003cspan\u003e7340 - 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\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRelated Products\u003c\/strong\u003e: \u003cspan\u003e2156 - 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\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCross sell \/ Upsell Part Numbers\u003c\/strong\u003e: \u003cspan\u003e311105 - 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\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCNC-Machined Combustion Chamber\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCombustion Chamber Volume\u003c\/strong\u003e: \u003cspan\u003e68\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Port Shape\u003c\/strong\u003e: \u003cspan\u003eSquare\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Runner Volume\u003c\/strong\u003e: \u003cspan\u003e130\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Angle\u003c\/strong\u003e: \u003cspan\u003e6\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Diameter\u003c\/strong\u003e: \u003cspan\u003e1.680\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Stem Diameter\u003c\/strong\u003e: \u003cspan\u003e0.34375\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGuide Plates Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Port Shape\u003c\/strong\u003e: \u003cspan\u003eRectangle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Runner Volume\u003c\/strong\u003e: \u003cspan\u003e200\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Angle\u003c\/strong\u003e: \u003cspan\u003e6\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Diameter\u003c\/strong\u003e: \u003cspan\u003e2.072\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Stem Diameter\u003c\/strong\u003e: \u003cspan\u003e0.3438\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: \u003cspan\u003eAluminum\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRocker Arm Studs\/Bolts Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Guide Material\u003c\/strong\u003e: \u003cspan\u003eManganese Bronze\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Guide Diameter\u003c\/strong\u003e: \u003cspan\u003e.545\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Lock Material\u003c\/strong\u003e: \u003cspan\u003eChromoly Steel\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Locks Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Spring Maximum Lift\u003c\/strong\u003e: \u003cspan\u003e.600\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Springs Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCNC Machined Exhaust Port\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCNC Machined Intake Port\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCNC-Machined Intake Runner\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Head Gasket Included\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Head Style\u003c\/strong\u003e: \u003cspan\u003eAssembled\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Port Location\u003c\/strong\u003e: \u003cspan\u003eStandard\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Job Diameter\u003c\/strong\u003e: \u003cspan\u003e1.680\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Port Location\u003c\/strong\u003e: \u003cspan\u003eStandard\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eQuantity\u003c\/strong\u003e: \u003cspan\u003eSingle\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRetainer Diameter\u003c\/strong\u003e: \u003cspan\u003e1.055\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRetainer Lock Style\u003c\/strong\u003e: \u003cspan\u003e7\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRetainer Material\u003c\/strong\u003e: \u003cspan\u003eSteel\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSteam Holes Drilled\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Cover Mounting Style\u003c\/strong\u003e: \u003cspan\u003ePerimeter Bolt\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Guide Size O.D\u003c\/strong\u003e: \u003cspan\u003e.545\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Lock Style\u003c\/strong\u003e: \u003cspan\u003eSingle Groove\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Spring Type\u003c\/strong\u003e: \u003cspan\u003eBeehive\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":47313046274186,"sku":"EDEL-61039","price":1360.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0619\/2778\/files\/0_edel_61035-roller_v8_normalized.jpg?v=1776720263","url":"https:\/\/www.onlyinstock.com\/products\/edelbrock-61039","provider":"Only In Stock","version":"1.0","type":"link"}