This head is sold as an unassembled bare casting. It is finished machined and includes valve guides and valve seats installed. This head does NOT include rocker studs, valves, springs, retainers or locks.

Cylinder Head Specifications

• Intake Port Volume: 320cc - Rectangle Port
• Combustion Chamber Volume: 119cc
• Valve Sizes: 2.250' Intake / 1.880' Exhaust ( 11/32' Stem Diameter )
• 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 070-135-3606, Manley p/n 660-42192 Bolts / 42102 Washers
• Head Studs: ARP p/n 070-235-4702 (12-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 BB-Chevy, Brodix p/n 158-1230
• Rocker Arms: Standard BB-Chevy
• Lifters: Standard
• Pistons: Standard BB-Chevy
• Valve Centerline: Standard BB-Chevy
• Exhaust Pattern: Raised .600"
• Spring Pockets: May not be cut any larger or deeper than 1.625'
• Accessory Bolt Holes are Drilled
• Recommended Intake Manifold: Brodix BM 2000 (p/n 158-BM2000) / HV 2001 (p/n 158-HV2001)

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART