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World Products 042650-1

Small Block Chevy 305ci S/R Cast Iron Cylinder Head 170cc Intake Ports

World Products 042650-1

955-042650-1

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World Products 042650-1 Small Block Chevy 305ci S/R Cast Iron Cylinder Head 170cc Intake Ports $558.13
Small Block Chevy 305ci S/R Cast Iron Cylinder Head
  • 170cc Intake Ports
  • 58cc Combustion Chambers
  • 1.940'' Int/1.500'' Exh Valves
  • 1.250'' Valve Springs, .560'' Max Lift for Hydraulic Cam
  • Assembled, Sold Individually

  • World Products 042650-1 Details

    Small Block Chevy 305ci S/R Cast Iron Cylinder Heads

    Perfect for use on 262-307 cubic inch small blocks. 1.940 x 1.500 valves, 170cc intake runner, 1.250'' single spring, 100# @ seat, .560'' max lift.

    Material: High density cast iron
    Valve Seats: Integral intake,hardened steel exhaust
    Valve Size: 2.020'' x 1.600'' (1.940'' x 1.500'' for S/R Torquer 305)
    Accessory Flange: Stock locations, 7-bolt universal pattern

    Included In Assembly: Erson stainless steel valves, ring and band valve seals, valve springs, Erson 7° chrome moly retainers, and keepers.

    Recommended Installation Items:

    Head Gaskets: Fel-Pro #1003 (265-350) or equivalent.
    Puhshrods: OEM can be used. Hardened not required
    Screw-in Studs: 3/8" or 7/16" with 7/16"-14 base thread
    Pushrod Guidplates: These heads are not machined for guide plates. If desired Flat 5/16" Erson 601 or equivalent can be used after .125" is milled off the stud bosses and the push rod holes opened
    Spark Plugs: Accepts 14mm-5/8'' .460'' reach tapered seat (Accel 274 or 276, AC-Delco 43TS or 44TS, Champion #670 or #802) or equivalent
    Intake Gasket: Fel-Pro #1204 or #1256 or equivalent
    Exhaust Gasket: Fel-Pro #1404 or #1405 or equivalent

    Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Volume (cc)
    58
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Cast iron
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    Square
    Exhaust Valve Diameter (in.)
    1.5
    Exhaust Valves Included
    Yes
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    170
    Intake Valve Diameter (in.)
    1.94
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.56
    Number of Springs Per Valve
    Single
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.25
    Quantity
    Sold individually
    Retainer Material
    Chromoly steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Spark Plug Style
    Straight
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Center and perimeter bolt
    Valve Guide Material
    Cast iron
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    3-angle
    Valve Seat Material
    Steel
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Positive stop
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    042650-1

    An Economical Stock Replacement Head.

    There are many compelling reasons why it's smart to use S/R cylinder heads instead of worn out junkyard parts or new OEM castings. These World Products heads come with hardened steel exhaust seats compatible with unleaded gasoline. The extra thick decks and walls improve reliability. The machined valve cover rails help to eliminate leaks.

    Technical Specifications
  • Material: High density cast iron
  • Valve Seats: Integral intake,hardened steel exhaust
  • Valve Size: 1.940'' x 1.500''
  • Accessory Flange: Stock locations, 7-bolt universal pattern
  • Included In Assembly: Erson stainless steel valves, ring and band valve seals, valve springs, Erson 7° chrome moly retainers, and keepers.

    Recommended Installation Items
  • Head Gaskets: Fel-Pro #1003 (265-350) or equivalent.
  • Pushrods: OEM can be used. Hardened not required
  • Screw-in Studs: 3/8" or 7/16" with 7/16"-14 base thread
  • Pushrod Guidplates: These heads are not machined for guide plates. If desired Flat 5/16" Erson 601 or equivalent can be used after .125" is milled off the stud bosses and the push rod holes opened
  • Spark Plugs: Accepts 14mm-5/8'' .460'' reach tapered seat (Accel 274 or 276, AC-Delco 43TS or 44TS, Champion #670 or #802) or equivalent
  • Intake Gasket: Fel-Pro #1204 or #1256 or equivalent
  • Exhaust Gasket: Fel-Pro #1404 or #1405 or equivalent

    Here are the OEM casting numbers that World's S/R small block heads replace:
    World #043600 = GM 333882, 460703, 462624, 468642, 3911032, 3927186, 3927187, 3932141, 3946813, 3947041, 3970126, 3973414, 3973493*, 3974387, 3981598*, 3986339, 3998920, 3998991, 3998993, 3998997, 14020516, 14020517, 14020556, 14071114, and 14079261.

    World #043610 = GM3795896, 3814482, 3827185, 3884520, 3890462, 3911032, 3917290, 3917291, 3927186, 3932441, 3946813, 3973370 and3998993 *=Requires drilling for steam holes

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