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World Products Big Block Chevy Merlin III Cast Iron Cylinder Heads


World Products
World Products Big Block Chevy Merlin III Cast Iron Cylinder Heads

Product images may differ from actual product appearance.

Improved Performance Over Chevy's Legendary LS6 Heads!

Merlin 269cc Oval Port heads are excellent for most street-driven big-blocks up to 468ci. They'll out-perform larger heads in many applications. When larger engines (454 to 540ci) require added flow, choose the Merlin Rectangle Port cylinder heads. With RightCast 320cc and 345cc intake runners, you can expect solid gains in air/fuel mixture combustion charges. These World Products heads will really respond to higher compression ratios, and are ideally suited for hot street/strip cars.

Technical Specifications
  • Material: High density cast iron
  • Valve Seats: Integral intake,hardened steel exhaust
  • Valve Guides: Integral cast iron
  • Valve Spring Seats: Bare castings machined for 1.550'' springs
  • Valve Size: 2.300'' x 1.880''
  • Exhaust Flange: Port location raised .250'' , accessory bolt holes, requires ARP Head Bolts #070-135-3605.
  • Included In Base Assembly: Erson stainless steel valves, ring and band style (-1 and -2 models) or PC style (-3 and -4 models) valve seals, 1.550'' (-1, -2 and -3 models) or 1.640'' (-4 models) valve springs, Erson 7° (-1 and -2 models) or 10° (-3 models) retainers and keepers.

    Recommended Installation Accessories
  • Head Gaskets: Fel-Pro 375-1017-1 or equivalent
  • Pushrods: Requires heat treated pushrods
  • Rocker Arm Studs: 7/16'' with 7/16''-14 base thread
  • Pushrod Guideplates: BBC Stepped 3/8''
  • Spark Plugs: Accepts 14mm .460'' reach tapered seat 5/8'' hex (AC Delco R42TS/R43TS) or equivalent. Heat range may vary. Consult with engine builder.
  • Intake Gasket: Fel-Pro 375-1212 or equivalent for oval port head. Fel-Pro 375-1211 or equivalent for rectangle port head.
  • Exhaust Gasket: Fel-Pro 375-1410 or equivalent
  • Head Bolts: 8 longer than stock required (955-832015-8)


  • 7 Products
    Big Block Chevy Merlin III Cast Iron Oval-Port Cylinder Heads

    955-030040-1
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 269cc Oval Intake Ports
  • 119cc Combustion Chambers
  • 2.300'' Int/1.880'' Exh Valves
  • 1.550'' Valve Springs, .600'' Max Lift for Hydraulic Cam
  • Assmebled, Sold Individually
  • $9.99
    $725.99
    Ships

    955-030040-2
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 269cc Oval Intake Ports
  • 119cc Combustion Chambers
  • 2.300'' Int/1.880'' Exh Valves
  • 1.550'' Valve Springs, .650'' Max Lift for Hydraulic Roller Cam
  • Assembled, Sold Individually
  • $755.99
    Order Today Ships 12/30/14
    Big Block Chevy Merlin III Cast Iron Rectangular-Port Cylinder Heads

    955-030620
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 320cc Rectangular Intake Ports
  • 119cc Combustion Chambers
  • Cut for 2.300'' Int/1.880'' Exh Valves
  • Bare Head, Sold Individually
  • $9.99
    $602.99
    Order Today Ships 12/30/14

    955-030620-2
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 320cc Retangular Intake Ports
  • 119cc Combustion Chambers
  • 2.300'' Int/1.880'' Exh Valves
  • 1.550'' Valve Springs, .650'' Max Lift for Hydraulic Roller Cam
  • Assembled, Sold Individually
  • $9.99
    $755.99
    Order Today Ships 12/30/14

    955-030620-3
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 320cc Rectangular Intake Ports
  • 119cc Combustion Chambers
  • 2.300'' Int/1.880'' Exh Valves
  • 1.550'' Valve Springs, .700'' Max Lift for Solid Roller Cam
  • Assembled, Sold Individually
  • $829.99
    Order Today Ships 12/30/14

    955-030630
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 345cc Rectangular Intake Ports
  • 119cc Combustion Chambers
  • Cut for 2.300'' Int/1.880'' Exh Valves
  • Bare Head, Sold Individually
  • $9.99
    $602.99
    Order Today Ships 12/30/14

    955-030630-2
    Big Block Chevy Merlin III Cast Iron Cylinder Head
  • 345cc Rectangular Intake Ports
  • 119cc Combustion Chambers
  • 2.300'' Int/1.880'' Exh Valves
  • 1.550'' Valve Springs, .650'' Max Lift for Hydraulic Roller Cam
  • Assembled, Sold Individually
  • $755.99
    Order Today Ships 12/30/14

    7 Products