AFR 1074/1075 SBC 227/65 OR 75CC .710 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZE

Regular price $ 1,796.80

CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

AFR's 227cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications).
227cc Aluminum SBC Cylinder Heads
Part # Exhaust Port Porting Finish Combustion Chamber
1067 Stock Race Ready 75cc
1068 Stock Race Ready 65cc
1120 Stock Competition 75cc
1121 Stock Competition 65cc
1074 Spread Port Race Ready 65cc
1075 Spread Port Race Ready 75cc
1124 Spread Port Competition 65cc
1125 Spread Port Competition 75cc

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227cc Race Ready Flow Chart
  .200 .300 .400 .500 .550 .600 .650 .700
Int 148 210 261 296 304 312 315 318
Exh 116 162 204 220 225 229 233 237
227cc Competition Flow Chart
  .200 .300 .400 .500 .550 .600 .650 .700 .750
Int 152 212 265 300 312 319 324 327 329
Exh 120 167 214 230 234 238 241 243 245

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", 3/4" radius plate exhaust, 1 7/8" curved pipe

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.100" x 5.000" Overall Valve Length
7256
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length
7254
PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400
8000
Manley 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D
8511
10° Bead Lock Valve Keepers with lashcap recess
9009
ARP 7/16" Rocker Studs
6405
Adjustable 5/16" Guide Plates
6103
Viton Valve Seals .600" O.D x .495" I.D
6612
Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D
8048
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep
9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep
9070
8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L
9051
Specifications & Features:
Material
A356 Aluminum
Intake Port Volume
227cc
Intake Port Dimension
2.200" H x 1.290" W 5/16 Radius
Intake Port Location
Stock
Exhaust Port Volume
80cc
Exhaust Port Dimension
1.430" H x 1.540" W
Exhaust Port Location
.250" Raised
Combustion Chamber Size
65cc or 75cc
Valve Cover Bolt Pattern
Perimeter Bolt
Valve Angle
23°
Valve Spring Pocket Diameter
1.580" O.D
Max Valve Spring Pocket Machining
1.680" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness
.750"
Minimum Bore Diameter
4.000"
Flat Mill
.006" per cc 60cc Maximum
Angle Mill
.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area
2.340 sq. in.
Spark Plug Dimensions
14mm x .750" w/Gasket Seat
Carb EO#
Non Emissions Compliant

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Warning: May cause cancer and reproductive harm.