ATK HPSBF185 Small Block Ford 58cc/185cc Cylinder Heads Assembled (Set)

Description

Specifications:
Material A356 Aluminum
Intake Port Volume 190cc
Intake Port Dimension 2.050″H x 1.210″W
Intake Port Location Stock
Intake Valve Size 2.02” (8mm Stem)
Intake Valve Material Stainless Steel
Exhaust Port Volume 63cc
Exhaust Port Dimension 1.324″H x 1.331″ W
Exhaust Port Location Stock
Exhaust Valve Size 1.600” (8mm Stem)
Exhaust Valve Material Stainless Steel
Combustion Chamber Size 58cc
Valve Cover Bolt Pattern Perimeter Bolt
Valve Angle 20° Degree
Valve Spring Pocket Diameter 1.635″ O.D
Valve Spring Double
Valve Spring Setup Height 1.800”
Valve Spring Closed Pressure 150lbs (W/Retainer)
Valve Spring Open Pressure 1.200” .600” Lift 390lbs (W/Retainer)
Valve Spring Max Lift .625”
Valve Guide Material Manganese Bronze
Valve Seal Material Viton
Valve Seat Material Powder Metal
Retainer Material Steel with 7° Bead Lock Keepers
Deck Thickness .750”
Minimum Bore Diameter 4.000″
Flat Mill .006″ per cc 54cc Max (from 58cc)
Spark Plug Dimensions 14mm x .750″ with Gasket Seat
Head Bolt Diameter ½”
Torque Specifications Per Application Based on Factory or Aftermarket Bolts/Studs

Recommended Components:
Intake Port Gasket Fel Pro MS90103-1 or Per Application
Exhaust Port Gasket Fel Pro 1487 or Per Application
Head Gasket Fel Pro 8548PT2, 1011-1 or Per Application
Head Bolts ARP 154-3603
Head Studs ARP 254-4503
Spark Plug Starting Range Autolite 3923 or Per Application
Lifters Factory Hyd. Roller Lifters or Per Application
Pushrods Per Application (must check length)
Rocker Arms Aftermarket Roller Rockers

Disclaimer: It’s up to the installer to verify all fitment and components will work on the engine. Everything listed is just a recommendation. ATK is not responsible for damage to heads or engines due to miss matched components or wrong application.

These cylinder heads are Flow Tested on a Super Flow SF600 bench with a 4.030” bore size @28” water. Clay intake radius was used, Flow tube was not used on the exhaust port.