Dart Big Block-Chevy Iron Eagle Cylinder Head 308cc Intake Ports
301-15100111
Items You Need
Big Block Chevy Iron Eagle Cylinder Heads - 308cc Intake Ports, 119cc Combustion Chambers
Material: Superior cast iron alloy
Combustion Chambers: 119cc
Intake Valve Dia: 2.25''
Intake Port Dim: Int Port Location: Stock
Intake Gasket: Mr. Gasket 720-121
Exhaust Valve Dia: 1.88''
Exh Port Volume: 129cc
Exh Port Dim: 1.670'' x 1.800''
Exh Port Location: Raised .300'' Standard Bolt Pattern
Exhaust Gasket: Fel-Pro 375-1412
Exhaust Bolts: 1'' longer than stock (4) ea.
Flow, Intake: 363cfm @ .800'' lift
Flow, Exhaust: 266cfm @ .800'' Lift
Manifold: Rectangular Port Dart (opening - 1.575'' x 2.250'') 6.25'' tall
Milling: Min 110cc (.005'' = 1cc) Flat Mill only
Pistons: Most aftermarket pistons
Push Rod Length: Avg +.200'' / +.250'' Should always measure; Stock Length Int = 8.275'' / Exh = 9.250''
Retainers: 1.625'' - Titanium / 1.550'' - Moly Steel 10°
Spark Plug: .750'' reach, gasketed, Champion C59C / C59YC Street RC12YC
Spring Cups: 1.625'' - .035 cup / 1.550'' - ID locator
Springs: 1.550'' Single Springs, 145lbs @ 1.900'', .660'' Max Lift Comp Cams 249-936
Stud Girdle: Must use Dart design 301-64110001
Valve Angles: Int - 24°, Exh - 15° (Rolled 2°) 4° cant
Valve Length: Int - 5.475'' (+.250'') Exh - 5.435'' (Stock)
Valve Stem Dia: 11/32''
Valve Train: Standard BBC 7/16'' stud mount
Valve Guides: 1/2'' OD Mag-bronze Cut for .530'' PC seals (.002'' press)
Valve Guide Length: Int - 2.100'' Exh - 2.250''
Valve Guide Clearance: .0014'' - .0021'' (with 11/32'' dia valve stem)
Valve Guide Spacing: Exh moved .045'' away from Int
Valve Seats: Exh = Tungsten hardened alloy, .006'' press (TIR .004)
Valve Seat Dim: Exh - 2.000'' x 1.600'' x .375''
Valve Seat Angles: Int = 32° - 45° - 60° - 70°, Exh = 37° - 45° - radius
Valve Covers: 301-68000040
Torque: Head Bolts = 70 ft/lbs; Rocker Studs = 45 ft/lbs; Manifold = 35 ft/lbs
Block Use: Mark IV, Gen V, Gen VI with proper head gasket
Weight: 70 lbs
can i use stock pushrods
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.