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World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 320cc Rectangular Intake Ports

World Products 030620-3


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World Products Big Block Chevy Merlin III Cast Iron Cylinder Head 320cc Rectangular Intake Ports $872.07
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

  • World Products 030620-3 Details

    Big Block Chevy Merlin III Cast Iron Rectangular-Port Cylinder Heads

    Valve Spring Specs: 1.550'' Dual Valve Springs 225# Seat, .700'' Max Lift


    Manufacturer's Part Number:

    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)

  • Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations