Head Gasket Mark IV Fel-Pro #1017-1 or equivalent
Head Bolt Torque 75 ft/lbs.
Head Bolts Mark IV ARP #135-3712
Head Studs Mark IV ARP #235-4713
Rocker Stud Torque 50 ft/lbs.
Rocker Stud Girdle Harland Sharp G1114 or equivalent
Rocker Arms Stud Mount Standard
Intake Port (cc) 320cc
Intake Port Dimensions 2.45" x 1.75" Rectangle
Intake Gasket Fel-Pro #1252-3 or equivalent
Exhaust Port (cc) 125cc
Exhaust Port Location Raised .375"
Exhaust Port Dimensions 1.75" x 2.00" D
Exhaust Gasket PW #419 or equivalent
Intake Valve Size 2.25"
Exhaust Valve Size 1.88"
Valve Angle 24°/15°
Valve Spring Pocket O.D. 1.735"
Valve Guide Size 11/32" .530" (Top) .570" (Base)
Deck Thickness .750"
Combustion Chamber (cc) 120cc
Minimum Bore Diameter 4.25"
Spark Plug Size 14mm x .750" Gasket (eg. Autolite #3924)
Spark Plug Location/Angle OE/Angle
Check out the engine dyno test on these heads! Heads were installed
unmodified (as shipped) in a 496ci mild hydraulic roller motor. Pump gas, street driver and still delivered over 700HP and 600 ft/lbs of torque! Dyno test performed by Richmond Engines, Surrey BC.
