Ford 429 460 275cc 95cc Hydraulic Flat Assembled Cylinder Heads

Assembly Specifications

Max Lift: .600
Coil Bind: .900
Intake Install: 130lbs @ 1.9
Exhaust Install: 130lbs @ 1.9
Closed Sear Pressure: 130lbs
Open Seat Pressure: 300lbs

One of the best upgrades to your Big Block Ford engine is the replacement of your cast iron head to a better performing and lighter aluminum head. How great is it that you can now do it at a price that's affordable. Our line of Big Block Ford performance heads have proven themselves time and time again both on the track and on the dyno, not to mention countless features in performance magazine articles. We offer Big block ford cylinder heads for a wide range of displacement applications. With bigger displacement engines becoming more common, the need for more airflow is necessary. If you are looking to build a 400-700 horsepower engine then you should consider Speedmaster Aluminum cylinder heads. Like the rest of our performance heads we use our "Gravity Die Cast“ process. This casting process creates a much more uniform and robust cylinder head. They also offer a smaller cross section to increase the incoming air"•s velocity resulting in improved drivability, power and economy. We have them available in as cast for the mild street applications and in Fully CNC machined for the serious enthusiast. Speedmaster CNC ported cylinder heads are machined on a dedicated 5 axis CNC machining centers to ensure accuracy and cost effectiveness. Combustion chamber, exhaust and intake ports are fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area. CNC ported heads eliminate human error and variation from port to port.

Intake & Exhaust Gaskets

Our Big Block Ford (385 Series) cylinder heads are designed to work with standard intake manifolds and exhaust headers.

• Recommended Intake Gaskets:
  • Speedmaster PCE349.1009
  • Fel-Pro #1231 (alternative)
• Recommended Exhaust Gaskets:
  • Speedmaster PCE355.1009
  • Fel-Pro #1420 (standard paper gasket)

Head Gaskets

These cylinder heads are compatible with standard OEM-style head gaskets.

• Recommended Head Gasket (Engines under 4.500" Bore):
  • Fel-Pro #1018

Head Bolts / Studs

Big Block Ford engines utilize 9/16" diameter head bolts or studs. Proper torque is essential for reliable sealing and performance.

• Torque Specification:
  • 145 lb-ft with high-pressure moly lubricant
  • Use a 3-step process: start at 70 lb-ft, then increase in 25 lb-ft increments
• Recommended Hardware Kits:
  • Speedmaster Head Stud Kit: PCE279.1015
  • Fel-Pro Head Bolt Kit: #155-4203
  • Fel-Pro Head Stud Kit: #255-3701

Spark Plugs

These heads are designed for use with standard 14mm thread, 5/8" hex, 0.750" reach spark plugs. For best results, choose heat ranges appropriate for your application.

• Compatible Spark Plug Options:
  • NGK: BCPR6ES, R5671A-7, R5671A-8
  • Autolite: 3923, 3924, AR3933, AR3934
  • Champion: RC12YC, RC10YC4, RC9YC3

Tip: For boosted or nitrous applications, a colder heat range plug is recommended.