Assembly Specifications Max Lift: .580 Coil Bind: .740 Intake Install: 130lbs @ 1.8 Exhaust Install: 130lbs @ 1.8 Closed Sear Pressure: 125lbs Open Seat Pressure: 320lbs The Speedmaster Ford Cleveland cast irone heads are a perfect upgrade for both 2 and 4 barrel engines. Not only do you get more performance out of the box than OEM heads, but they retain the stock look. As another benefit, you can run higher compression with these heads before the onset of power robbing detonation. There is absolutely no reason to rebuild a set of OEM castings when you can buy a better performing, higher flowing and more detonation resistant cylinder head for less money from us! To top it all off, we offer aluminum and CNC ported Cleveland heads for people looking for even more performance. INTAKE / EXHAUST GASKETS All stock gaskets will work with these cylinder heads. The exhaust side of the head uses standard 4v exhaust gaskets. You can use Speedmaster SM3274 or Fel-Pro 1416 header gaskets which measure 1.89 (W) x 2.19 (T). HEAD GASKETS The Speedmaster PCE281.1703, PCE281.1714, PCE281.1724 and PCE281.1726 cylinder heads use the following head gaskets for use with 351C block: Speedmaster PCE348.1005 (MLS 4.055 gasket bore) Fel-Pro 1013 (Composite 4.100 gasket bore) Both gaskets are .040 thickness when compressed. HEAD BOLTS / STUDS Use Speedmaster PCE279.1014. These studs should only be finger tightened into the block. Torque the nuts to stock specifications. using high pressure moly lube, in increments of 15lbs. SPARKPLUGS Our Ford Cleveland cylinder heads require the use of a 14mm. thread 5/8 hex, .750 reach spark plugs. Below you will find a list of some plugs that fit and work with our heads: NGK - BCPR6ES, R5671A-7, R5671A-8 Autolite - 3923, 3924, AR3933, AR3934 Champion - RC12YC, RC10YC4, RC9YC3 Remember that you need a COLDER plug when you make more power, ie. N2O, Turbo and supercharging.
Speedmaster has become a leader in its field, built on a long term consistency of being a specialist in aftermarket automotive components. The team has shared all the finest moments in the numerous accolades for its people, its products, and its approach. Speedmaster is also one of the rare companies to produce its own products, where majority items are entirely developed and manufactured in its workshops. The ultimate token of precision, Speedmaster is the world’s only major parts manufacturer to equip cars from Standard replacement to Top Fuel Dragsters.
In 1979, the company was founded with Pete’s Performance, which was a small speed workshop. It began by building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing and racing high performance engine parts. Over the years, the company has grown into a worldwide high performance powerhouse. Growing from a one-man bricks-and-mortar business; to now a supply chain in which en