Timing Chain and Gears Included. Outside Diameter of Outer Spring (in).
Number of Springs Per Valve. Rocker Arm Nut Thread Size. Don't spend hours figuring out which pieces and parts you need to get what you want from your engine.
Procomp Electronics has already done the work for you; our Top-End engine kits will save you the time and hassle of mixing and matching components yourself. These kits are specifically designed to deliver the performance you want, at a better price than purchasing the parts separately. Kits include: Fully assembled Procomp Electronics cylinder heads Intake manifold Valve covers I.
Ntake manifold gaskets Roller rockers Guideplates Screw in studs Assembly Specifications Max Lift. Designed for serious performance big block applications, they feature nitrous bosses, dual distributor holddowns, four corner water ports, and are available for both rectangular or oval port cylinder heads.
Rectangular port size at the gasket flange is 1.69-inches wide by 2.31-inches tall, which can be opened up to match the gasket and/or larger port cylinder heads. Runner size is effective for 468 to 540 cid engines.Intake Manifold Gasket Information Procomp Electronics intake manifold gaskets have Printoseal construction, which puts beads of special elastomers around the ports for extra sealing power. They also feature a non-metallic, rubber-fiber base material that resists gasoline and alcohol, while allowing engine builders to precision-trim around the intake ports. Cylinder Heads Suggested Parts Head Gaskets Due to the wide combustion chamber needed to fit around the large 2.250/ 1.880_ valves, we recommend our PCE348.1004 MLS head gaskets. 041_ thick, and fit bore sizes as large as 4.540_ on all Mark IV and VI blocks, as well as aftermarket blocks. Felpro 1017 gaskets will also work with these head/ block combos. To install our BBC heads on Mark V blocks, you will need to use our SM5233L and SM5233R Elite Series MLS head gaskets. Alternatively, you can use Victor Reinz # 4918(R) & #4923(L) head gaskets on Mark V blocks with our heads.
Spark Plugs Our heads require the use of 14mm. X 3/4_ reach 5/8_ hex gasket seat sparkplugs. Some recommended plugs are; NGK BCPR6ES or R5671A-7, Champion RC12YC, Autolite AR3923 or AR3924.
Remember these are for mild street engines. Higher compression or boost requires colder sparkplugs! Head Bolts / Studs Due to the raised +. 625_ exhaust port location on our heads, +. 100_ longer bolts / studs are needed next to each port.Use our PCE279.1005 head stud Kit. If you already have a standard BBC head stud kit and are just looking for the 8 +. These heads should be torqued to 65ft. Using high pressure moly lube or 70ft. Exhaust Gaskets Our BBC heads utilize a 1.88_ x 1.88_ square exhaust port. This exhaust port requires specific gaskets. Our PCE355.1003 gaskets are made of re-useable copper, or if you prefer paper, use our pn# SM5123.
Felpro also offers gaskets that work with our heads as # 1410. The item "Chevy BBC 454 Hyd Roller Cylinder Head Top End Engine Combo Kit" is in sale since Thursday, March 16, 2017.This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "atracingworld-usa" and is located in Rialto, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Colombia, Panama, Jamaica, Viet nam.