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World Products 042650

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

World Products 042650

955-042650

made in usa
jegs shipping
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Estimated ship date 10/02/17 if Ordered Today
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World Products 042650 Small Block Chevy 305ci S/R Cast Iron Cylinder Head 170cc Intake Ports $331.28
Small Block Chevy 305ci S/R Cast Iron Cylinder Head
  • 170cc Intake Ports
  • 58cc Combustion Chambers
  • Cut for 1.940'' Int/1.500'' Exh Valves
  • Bare Head, Sold Individually

  • World Products 042650 Details

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

    Perfect for use on 262-307 cubic inch small blocks.

    Material: High density cast iron
    Accessory Flange: Stock locations, 7-bolt universal pattern

    Recommended Installation Items:
    Head Gaskets: Fel-Pro #1003 (265-350) or equivalent.
    Puhshrods: OEM can be used. Hardened not required
    Spark Plugs: Accepts 14mm-5/8'' .460'' reach tapered seat or equivalent
    Intake Gasket: Fel-Pro #1204 or #1256 or equivalent
    Exhaust Gasket: Fel-Pro #1404 or #1405 or equivalent

    Specifications:

    Manufacturer's Part Number:
    042650

    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 276 or 276s, AC-Delco 44TS, Champion BL13Y or BL15Y) 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

  • On these World Products heads 042650, the specs are confusing about the rocker arms required. I plan on using standard 1960's style stock rocker arms. Why does the spec sheet say to use a standard "offset" rocker arm? Does this mean a stock rocker?

    Asked by: Jets
    yes, stock rockers will work just fine.
    Answered by: BrandonJ
    Date published: 2017-08-29
    • y_2017, m_9, d_25, h_3CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_1
    • loc_en_US, sid_10001_10001_58196, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs
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