Cylinder Heads BBC 320cc Bare Aluminum (Pair)

Description

320cc BIG BLOCK CHEVY, Aluminum Cylinder Heads

**Bare SET **

Aircraft Grade 356A T-6 Aluminum Alloy, CNC Ported

119cc Combustion Chamber, 320cc Intake Runners

Fits All OEM Bolt Pattern Manifolds, Intake Head Bolt Standard OEM Length

8 Bolt Exhaust Flange, Square Port Exhaust, 15/24 Degree Valve Angle

Manganese Bronze Valve Guides

3 Angle Cut Stellite Valve Seats

Takes Felpro 1275 bigger gasket set, Felpro 1047 Head Gasket

Uses Felpro # 1275 Rectangular Port Intake Gasket

65 ft.lb Torque Specs, Suggested Roller Cam Base of 1.130″

Mfg for an 8005 Single Spring w/damper, springs are designed for big block motors that require a 1.5250 outer diameter spring. Springs are designed for street/strip applications with cam combination with no more than .690-.750 lift. Spring pressures and installed heights are as follows.
140lbs at 1.900 165lbs at 1.850 180lbs at 1.800 350lbs at 1.300 365lbs at 1.250 380lbs at 1.200 Coil bind at 1.160

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.
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.