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Enginequest IMCA/WISSOTA Small Block Chevy Cylinder Heads

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Specs
Material Type:
Steel
Sold in Quantity:
Each
Finish:
Natural
Port Style:
Square Port
Intake Runners:
167 cc
Combustion Chamber:
76 cc
Cylinder Head Style:
-
Spark Plug Style:
Straight
Stud Diameter:
.38
Intake Valve Diameter:
1.94
Exhaust Valve Diameter:
1.50
Notes
Manufactures recommends using R5673-8 NGK or equivalent spark plugs. (373-133 or 373-134 Autolite).

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What's in the Box

This head is engraved and serial numbered by Engine Quest for IMCA's Sport Mods, Stock Cars, and Hobby Stocks. Now approved for WISSOTA Midwest Mods and Street Stocks.

Assembled heads will include the following:
  • 3/8" screw in studs # 915-99156
  • 76 cc combustion chamber
  • 167 cc intake runners
  • Straight plug
  • 1.94/1.50 intake/exhaust valves #910-14140-1 & 910-14145-1
  • Available bare or assembled and blue printed
  • Heavy duty valves
  • Retainers and locks # 915-39741 & 577-555
  • 1.25" high-performance valve springs # 180-671515
  • Three angle valve job


Item Details

Straight Plug
1.94/1.50 Intake Valves

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Note: Please use the Vendor Number to reference the PDF chart links listed.

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Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Slightly Hotter. 

  • Standard tip
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  • .460" reach
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  • Tapered seat
  • Non-resistor
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Note: Please use the Vendor Number to reference the PDF chart links listed.

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Racing Plug Tech Note (PDF)

Understanding Heat Range (PDF)

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