Big Block Chevy Top End Kits Include:

• Complete Cylinder Heads
• Single Plane Intake Manifold (4150 Series)
• Tall Cast Aluminum Valve Covers with Studs and Nuts
• Valve Cover, Intake, Exhaust, Carburetor and Head Gaskets
• Head Bolts with Washers
• Intake Bolts with Washers
• Spark Plugs
• Brodix Hat

Cylinder Head Specifications

• Intake Port Volume: 312cc - Rectangle Port
• Combustion Chamber Volume: 119cc
• Valves: 2.250' dia. x 5.218' o.a.l. Intake / 1.880' dia. x 5.394' o.a.l. Exhaust ( 11/32' Stem Diameter )
• Valve Springs: 1.550' Diameter - Open Pressure: 550 lbs.; Closed Pressure: 240 lbs.; Installed Height: 1.950'; Max Lift: .700'
• Spring Retainers: 1.550' 10° Steel
• Rocker Studs: 7/16'
• Guide Plates: 3/8'
• Valve Seals: 11/32'
• Spark Plug Configuration: Angled 

Facts and Related Components

• Torque Heads: 70 ft-lb.
• Torque Rocker Studs: 40-45 ft-lb.
• Intake Gasket: Brodix p/n 158-MG2001, Cometic p/n 245-C5428, Fel-Pro p/n 375-1252-3
• Head Gasket: 4.310' Bore - Fel-Pro p/n 375-1027, Cometic p/n 245-C5432; 4.540' Bore - Fel-Pro p/n 375-1017, Cometic p/n 245-C5433
• Exhaust Gasket: Fel-Pro p/n 375-1411 or Cometic p/n 245-C5429
• Head Bolts: ARP p/n 070-135-3601
• Head Studs: ARP p/n 070-135-4001 (6-point)
• Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
• Valve Angle: 26° and 4° Intake, 17° and 4° Exhaust
• Angle Milling: .0066' per cc
• Flat Milling: .0050' per cc
• Pushrod Slots: Standard
• Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
• Stud Girdle: Standard
• Rocker Arms: Standard
• Lifters: Standard
• Pistons: Standard
• Exhaust Pattern: Standard
• Valve Centerline: Standard
• Spring Pockets: May be step cut to 1.625'
• Accessory Bolt Holes are Drilled
• Recommended Intake Manifold: Brodix HV 2000 (p/n 158-HV2000) / HV 2001 (p/n 158-HV2001) / HV 2016 (p/n 158-HV2016)