The 302 small block is a V8 engine that Chevrolet and Ford both produced, though under different names and with different specifications
The Chevrolet 302 and Ford 302 are not the same engine, despite sharing a displacement of 302 cubic inches. Chevrolet's 302 was a short-lived variant of its small-block family, produced mainly in the 1960s and rarely seen in civilian vehicles. Ford's 302, introduced in 1968, became far more common and remained in production through the 1990s. If you own a vehicle with a 302 or are considering one, the manufacturer matters enormously — parts availability, performance characteristics, and repair costs depend on which version you have.
Both engines are naturally aspirated V8s with overhead valves. They sit in the middle of their respective manufacturers' small-block lineups in terms of displacement and power output. A 302 will never be the largest or most powerful option in a lineup, but it offers a practical balance of size, weight, and fuel consumption compared to bigger blocks. That middle-ground positioning is why the 302 shows up in everything from work trucks to muscle cars, depending on the year and process.
Key Takeaways
- Ford's 302 (1968–1997) is far more common than Chevrolet's 302, and the two engines are not interchangeable despite similar displacement.
- A 302 produces between 200 and 330 horsepower depending on the year, carburetor or fuel injection setup, and whether it has been modified.
- Ford 302 parts are widely available through automotive suppliers, but Chevrolet 302 parts may require specialty shops or used-engine sources.
- Rebuilding or replacing a 302 typically costs between $2,000 and $5,000 in labor and machine work, depending on damage and local shop rates.
Ford's 302: The version you are most likely to encounter
Ford introduced the 302 cubic-inch engine in 1968 as a mid-range option between the 289 and the 427. It stayed in production for nearly 30 years, appearing in Mustangs, F-Series trucks, Broncos, and full-size sedans. The engine was offered with either a two-barrel or four-barrel carburetor in early years, then switched to fuel injection in the 1980s. Output ranged from around 210 horsepower in base truck versions to 330 horsepower in high-performance Mustang and Cobra variants.
The Ford 302 became a favorite for hot-rodding and engine swaps because parts are abundant and the engine is relatively compact. Aftermarket manufacturers produce intake manifolds, cylinder heads, camshafts, and ignition systems specifically for the 302. You can find used 302 blocks, heads, and rotating assemblies at salvage yards and online marketplaces. Machine shops that specialize in small-block Ford work exist in most regions, making rebuilds and modifications straightforward compared to rarer engines.
Chevrolet's 302: A rare variant with limited availability
Chevrolet's 302 was produced in small numbers between 1962 and 1969, primarily for the Corvette and a few high-performance Chevelle models. It was never a mainstream engine and was quickly overshadowed by the 327 and 350. Finding a Chevrolet 302 today is uncommon, and finding parts for one is harder still. Many machine shops and parts suppliers do not stock 302-specific components because demand is too low.
If you own a vehicle with a Chevrolet 302, your best options for repair or rebuilding are specialty shops that focus on vintage Chevrolet engines or general machine shops willing to adapt parts from the larger 327 or 350. Some components are interchangeable with those bigger blocks, but not all. Expect longer lead times and higher costs for sourcing parts compared to a Ford 302 or other common small blocks.
Power output and performance across different years
Ford 302 horsepower varied significantly depending on the decade and process. A 1968–1970 Mustang 302 produced 250 horsepower. A 1979 truck version might produce 210 horsepower. A 1985–1986 high-output Mustang 302 with fuel injection reached 330 horsepower. The difference came from carburetor or fuel-injection design, compression ratio, cam profile, and exhaust systems. A stock 302 from the 1970s will feel noticeably slower than a 1980s performance version, even though the displacement is identical.
Aftermarket modifications can increase output significantly. A mild rebuild with a better intake, carburetor, and exhaust system might add 30 to 50 horsepower. A more aggressive build with ported heads, a performance cam, and tuning can add 75 to 100 horsepower or more. The engine's displacement limits its ceiling — a 302 will never compete with a 427 or 455 in raw power — but it can be made substantially more responsive than stock.
When a 302 needs rebuilding or replacement
A 302 typically needs rebuilding when it develops internal wear that cannot be fixed by routine maintenance. Common signs include low oil pressure, excessive blow-by (visible smoke from the crankcase vent), metal in the oil, or loss of compression in one or more cylinders. A compression test and oil analysis can confirm whether the engine is worn out or whether the problem is something simpler like a bad gasket or valve cover seal.
A full rebuild involves removing the engine, disassembling it completely, inspecting and machining the block, replacing the pistons and rings, reconditioning the crankshaft, and rebuilding the heads. Labor and machine work typically run $2,000 to $5,000 depending on the shop's location and hourly rate, the condition of the block, and whether the heads need valve work. Parts — pistons, rings, bearings, gaskets, and seals — add another $800 to $1,500. A used engine swap may cost less in parts but requires the same labor to remove and install.
Finding parts and choosing a machine shop
For a Ford 302, major suppliers like Summit Racing, Jegs, and RockAuto stock common components. Local automotive machine shops and speed shops often have 302-specific knowledge and can source harder-to-find items. Online forums dedicated to Ford small blocks (such as those on Classic Mustang or F-Series truck sites) can point you toward reputable shops in your area and help you identify which parts fit your specific year and process.
When choosing a machine shop, ask for references and ask specifically whether they have rebuilt 302s before. Request a written estimate that breaks down machine work (block boring, honing, head work) separately from parts and labor. A good shop will explain what they found during inspection and why certain work is necessary, rather than quoting a flat rate without looking at the engine first. For a Chevrolet 302, call ahead to confirm the shop is willing to work on that engine before dropping it off.
Fuel consumption and practical considerations
A stock 302 in a light vehicle (like a Mustang) typically achieves 12 to 16 miles per gallon, depending on driving conditions and whether the engine is carbureted or fuel-injected. Fuel-injected versions are slightly more efficient. In a heavier truck, expect 10 to 13 miles per gallon. These numbers assume the engine is in good tune and the vehicle is not heavily modified. A poorly tuned carburetor or a worn engine will consume more fuel.
The 302 is not a fuel-efficient engine by modern standards, but it is not a gas hog either. It sits between smaller four-cylinder and six-cylinder engines (which achieve 15 to 25 mpg) and larger V8s like the 427 or 455 (which often achieve 8 to 12 mpg). If fuel economy is a priority, a 302 is a reasonable compromise if you want V8 power without the worst consumption penalties of a big block.
Frequently Asked Questions
Can I swap a Ford 302 into a Chevrolet vehicle?
Yes, but it requires custom engine mounts, a custom radiator, fuel system modifications, and electrical work to integrate the Ford engine's ignition and fuel-injection systems with the Chevrolet chassis. The swap is possible but more involved than using a Chevrolet small block. Most people choose a Chevrolet 350 or 327 for a Chevrolet vehicle because the fit is simpler and parts are equally available.
How long does a 302 engine last?
A well-maintained 302 typically reaches 150,000 to 200,000 miles before major wear develops. Some engines last longer if they are not driven hard and oil changes are done on schedule. Engines used in performance driving or with poor maintenance may need rebuilding sooner. Regular oil analysis and compression tests can tell you when wear is accelerating.
Is a 302 better than a 350?
A 350 produces more horsepower and torque than a stock 302, but the 302 is lighter and more compact. For a street vehicle, a 350 is the more powerful choice. For a vehicle where weight matters (like a lightweight sports car), a 302 may be preferable. The choice depends on your vehicle's intended use and how much power you need.
What is the difference between a 302 and a 305?
The 305 is a Chevrolet engine with 305 cubic inches of displacement, while the 302 is either a Ford or Chevrolet engine with 302 cubic inches. The 305 was more common than the Chevrolet 302 and is easier to find parts for. If you are building a Chevrolet engine, a 305 or 350 is usually a better choice than hunting for a rare 302.
Can I rebuild a 302 myself?
A full engine rebuild requires specialized tools (honing equipment, torque wrenches, compression testers) and knowledge of machine work that most home mechanics do not have. You can handle disassembly, cleaning, and reassembly, but the machine work — boring, honing, and head work — should go to a professional shop. Many people do the teardown and reassembly themselves to save labor costs while paying the shop for the skilled work.