Ford 351 Cleveland 3V 235cc Aluminium Cylinder Heads with 74cc Chamber (Pair)

Aeroflow Ford Cleveland 3V 351 235cc Aluminium Cylinder Heads (Pair)

Unlock street- and strip-ready performance with Aeroflow’s complete 3V Ford Cleveland 351 cylinder heads. Crafted from lightweight A356 aluminium with a 74cc combustion chamber and 235cc intake port, these heads are designed to boost airflow, improve throttle response, and support stronger power delivery across a broad RPM range.

Key specifications at a glance

• Material: A356 Aluminium
• Chamber: 74cc
• Intake port volume: 235cc
• Intake port dimensions: 2.05" x 1.60"
• Exhaust port volume: 125cc
• Exhaust port dimensions: 1.61" H x 1.50" W
• Exhaust port location: Raised.080"
• Spark plug location: OEM
• Intake valve diameter: 2.100" | length: 5.275" | tip: 0.250"
• Exhaust valve diameter: 1.65" | length: 5.060" | tip: 0.250"
• Valve stem diameter: 11/32"
• Valve guide material: Manganese Bronze | guide O.D.:.530"
• Valve spring pocket I.D.: 1.570" | deck thickness:.750"
• Rocker studs: 7/16" x 14 (guide plates sold separately)
• Valve spring specs: installed height 1.900"; installed pressure 120lbs; open pressure 270lbs @ 500"; max lift.630"
• Spring outside/inside diameters: 1.550" / 1.145"
• Spring free length: 2.300"
• Valve spring retainer outside diameter: 1.495" | Step 1: 1.120" | Step 2: 0.637"
• Valve spring locator outside/inside diameters: 1.700" / 1.532"
• Intake valve seat pressure compatibility: suits flat tappet and hydraulic roller cams
• Rocker studs and guide plates: sold separately

Designed for performance, right out of the box

The Aeroflow Ford Cleveland 3V heads are built for performance-oriented street and race applications. The 235cc intake runners, combined with a 74cc chamber, deliver strong airflow and efficient combustion characteristics across idle to 6500 rpm. A5-angle competition valve job, diamond-honed bronze guides, hand bowl blending, and professional assembly contribute to improved flow numbers and durability, helping your 351 Cleveland breathe easier under higher RPMs.

Valve train and spring details you can rely on

These heads come with a larger-than-stock single 1.550" diameter valve spring designed to handle up to 0.630" maximum lift, enabling compatibility with a variety of cam profiles—from flat tappet to hydraulic roller. Important: installed seat pressure and open pressure should be verified for your specific application before installation to ensure optimal spring performance and longevity.

What you get

Sold as a pair, these complete heads are ready to bolt on with the understanding that rocker studs and guide plates are sold separately. They are designed to fit Ford Cleveland 351 3V engines and are suitable for idle-through-6500 rpm operation, balancing performance, durability, and budget-conscious pricing.