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ARC SBC20064SC943-3/8 #1

Small Block Chevy Complete Cylinder Heads Straight 205cc 3/8" Studs


Out of Stock (call for availability)

Cannot ship to AK, HI, AK, HI


Assault Racing Products Small Block Chevy Aluminum Cylinder Heads

Works on 305, 327, 350 and 400 not drilled for steam holes

(This is for a PAIR of cylinder heads)

  • 205cc Intake Port
  • 64cc Chamber
  • 2.02/1.6 Valve
  • Straight Plug
  • .550 Lift Springs
  • 3/8" Shouldered Screw In Studs and Guide Plates

These heads are complete and ready to bolt on.

  • Hardened exhaust seats for unleaded fuel compatibility
  • Bronze valve guides
  • Manufactured with aircraft quality high grade aluminum alloy
  • Multi-angle seat design for improved flow at low lifts
  • Advanced port design for improved flow at all lifts
  • Advanced combustion chamber design allows superb flame travel and burn
  • Additional pushrod clearance machined along outside port walls
  • Can use either early or late (Vortec) intakes
  • Can use either perimeter bolt pattern or center bolt valve covers
  • Threaded accessory holes in ends of heads
  • Retains stock 23 degree angle and intake/exhaust bolt locations
  • Thick deck to resist warping and allow for additional milling if desired
  • Does not require offset rocker arms

These heads will work for all small blocks including 400s (no steam holes). Heads are drilled for both the earlier style intake bolt pattern (pre '87) that had all bolts going in at an angle and the newer Vortec style that has 4 on each side going straight down in. Will not work with stock intake manifolds, must use an aftermarket raised runner intake.

Intake Port Volume


Combustion Chamber


Intake Valve Size


Exhaust Valve Size


Valve Stem Dia.


Intake Port Size

2.10" T x 1.18" W

Exhaust Port Size

1.4" T x 1.4" W

Spring Dia.

Comes w/1.26" Z28 Style (Max is 1.625")

Exhaust Crossover




Weight (per head)

20 lbs.

All assembled heads are assembled right here in Iowa in our machine shop and checked by our machinists before leaving!

Assembly features:

  • 1.26" diameter valve springs, good to .550" lift ("Flat Tappet" Hydraulic or Solid cams)
  • Stainless steel 1 piece swirl polished valves
  • Chrome Moly steel retainers
  • Hardened steel valve locks
  • 3/8" shouldered screw in studs
  • Guideplates

Categorized under:
  · Engine Parts » Cylinder Heads » Chevy » Small Block