Speedmaster PCE435.1021 Fits Chevy BBC 454 Solid Roller CNC Cylinder Head Top End Engine Combo Kit

Don't spend hours figuring out which pieces and parts you need to get what you want from your engine. PCE 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 PCE cylinder heads Intake manifold Valve covers Intake manifold gaskets Roller rockers Guideplates Screw in studs Assembly Specifications Max Lift: .650 Coil Bind: .925 Intake Install: 275lbs @ 2.1 Exhaust Install: 275lbs @ 2.1 Closed Sear Pressure: 210lbs Open Seat Pressure: 450lbs Intake Manifold Information These PCE Shootout Series Manifolds are designed to use a dominator style carburetor. This manifold is very similar in design to our PCE147.1036 manifold but has a carb flange that accommodates a Dominator carburetor. This manifold also has pads on the ports which can be drilled and tapped for nitrous nozzles or it is available from PCE machined for injector nozzles. Use the PCE Complete Fuel Rail Kit with this manifold. Intake Manifold Gasket Information PCE 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. These gaskets are .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. ARP #135-3703 12pt. Head bolts, and #235-4303 Head studs work too. If you already have a standard BBC head stud kit and are just looking for the 8 +.100_ studs, use our PCE279.1006 or ARP # 235-4306. These heads should be torqued to 65ft.lbs. using high pressure moly lube or 70ft.lbs. using 30wt. oil. Please consult your fastener manufacturer for their specific recommended torque values. 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.