Ford 5.8 Engine Guide: Specs, Problems & Upgrade Tips

1. Introduction to the Ford 5.8 Engine

The Ford 5.8 engine, also known as the 351 cubic-inch engine, is one of the most iconic V8s in Ford’s history. It was introduced in the late 1960s and remained a powerful and reliable option for decades. Whether it’s the 351 Windsor (351W) or the 351 Cleveland (351C), this engine represents the golden age of American muscle and utility.

2. Ford 5.8 Engine Variants

There are three main versions of the 5.8 engine:

VersionProduction YearsBlock TypeFuel TypeNotable Use
351 Windsor1969–1996Small BlockGasolineF-Series, Bronco, Mustang
351 Cleveland1970–1974Large BlockGasolineMustang, Torino
351M (Modified)1975–1982Large BlockGasolineTrucks, Full-Size Cars

3. Key Specifications

Specification351 Windsor351 Cleveland
Displacement5.8L (351 cu in)5.8L (351 cu in)
Horsepower (stock)150–240 hp250–280 hp
Torque280–325 lb-ft355–370 lb-ft
Bore x Stroke4.00" x 3.50"4.00" x 3.50"
ValvetrainOHV, 2V or 4V headsOHV, 2V or 4V heads

4. Performance and Reliability

  • Strengths:

    • Durable cast-iron block

    • Ample torque for towing and hauling

    • Easy aftermarket support for upgrades

  • Weaknesses:

    • Fuel efficiency is poor by today’s standards

    • Early emissions versions had reduced power

  • Common uses:

    • Muscle cars (Mustang Mach 1, Cobra)

    • Trucks and SUVs (Bronco, F-Series)

    • Performance builds and restomods

5. Differences Between Windsor and Cleveland

Feature351 Windsor351 Cleveland
Block WidthNarrowerWider, more rigid
Head DesignSmaller intake portsLarger, canted valves
StrengthHigh RPM capabilityBetter low-end torque


6. Aftermarket and Upgrade Potential

The Ford 5.8 engine is loved in the performance community due to its modding potential. Popular upgrades include:

  • Aluminum heads

  • Performance cams

  • EFI conversions

  • Superchargers and turbos

  • Forged internals for racing builds

7. Modern Applications & Engine Swaps

Although no longer produced, the 5.8 is still used in:

  • Classic car restorations

  • Off-road builds (Bronco restorations)

  • Custom swaps into Mustangs, Falcons, and trucks

8. Pros and Cons

Pros:

  • Strong low-end torque

  • Widely available parts

  • Classic V8 sound

  • Time-tested durability

Cons:

  • Heavy cast-iron design

  • Outdated fuel economy

  • Limited stock horsepower in later years

9. Final Thoughts

The Ford 5.8 engine continues to be a legendary powerplant, appreciated for its muscle car history, rugged design, and modding versatility. Whether you're restoring a classic, building a restomod, or doing a custom swap, the 5.8 delivers solid performance and nostalgia.


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