Are you in the market for a Ford 351 modified engine? You've come to the right place! Whether you're restoring a classic Mustang, building a hot rod from the ground up, or simply looking to boost the performance of your existing Ford vehicle, a modified 351 engine can provide the power and excitement you're craving. In this comprehensive guide, we'll dive deep into the world of modified 351 engines, exploring their benefits, what to look for when buying one, and where to find the perfect engine for your project. So buckle up, gearheads, and let's get started!

Why Choose a Ford 351 Modified Engine?

The Ford 351 engine, particularly the Windsor and Cleveland variations, has a long and storied history in the automotive world. Known for their robust design and potential for high performance, these engines are a favorite among enthusiasts and racers alike. But why choose a modified version over a stock 351? Here are a few compelling reasons:

• Increased Horsepower and Torque: This is the most obvious benefit. Modifications like performance camshafts, ported cylinder heads, and upgraded intake manifolds can dramatically increase the engine's power output. A well-built modified 351 can easily produce upwards of 400 horsepower, transforming your vehicle into a true performance machine.
• Improved Throttle Response: Modifications can also improve how quickly the engine responds to your inputs. Upgrades like electronic fuel injection (EFI) and lightweight rotating assemblies can make the engine feel more responsive and eager to rev.
• Enhanced Reliability: While it might seem counterintuitive, a properly modified engine can actually be more reliable than a stock one. This is because modifications often involve replacing wear-prone components with stronger, more durable parts. For example, forged pistons and connecting rods can withstand much higher levels of stress than their cast counterparts.
• Customization Options: One of the great things about the 351 engine is the sheer number of aftermarket parts available. This means you can customize your engine to suit your specific needs and preferences. Whether you're building a dedicated drag racer or a comfortable street machine, there's a combination of modifications that will work for you.
• That Classic V8 Sound: Let's be honest, a big part of the appeal of a classic V8 engine is the sound. A modified 351 with a performance exhaust system sounds absolutely incredible. The deep rumble and aggressive roar will turn heads wherever you go.

What to Look For When Buying a Ford 351 Modified Engine

Okay, so you're convinced that a modified 351 is the way to go. But before you start throwing money around, it's important to do your homework. Buying a modified engine can be a bit tricky, as you need to assess the quality of the modifications and the overall condition of the engine. Here are some key things to consider:

• Reputable Builder: The most important factor is the reputation of the engine builder. Look for a builder with a proven track record of producing high-quality, reliable engines. Check online reviews, ask for references, and don't be afraid to ask tough questions about their build process.
• Component Quality: Find out exactly what components were used in the engine build. Were they high-quality aftermarket parts from reputable manufacturers, or were they cheap, generic replacements? Look for names like Edelbrock, Holley, MSD, and ARP, which are known for their quality and performance.
• Engine Specifications: Get a detailed list of the engine's specifications, including bore and stroke, compression ratio, camshaft specifications, and cylinder head flow numbers. This information will help you understand the engine's performance potential and ensure that it's a good match for your vehicle.
• Dyno Testing: A reputable engine builder will have dyno-tested the engine to verify its performance. Ask for a dyno sheet, which will show the engine's horsepower and torque output at different RPMs. This is a valuable piece of information that can help you assess the engine's overall performance.
• Visual Inspection: If possible, inspect the engine in person before you buy it. Look for any signs of damage or wear, such as cracks, leaks, or excessive rust. Pay close attention to the cylinder heads, intake manifold, and exhaust manifolds, as these are common areas for problems.
• Warranty: Does the engine come with a warranty? A warranty can provide peace of mind and protect you from unexpected repairs. Be sure to read the fine print carefully to understand the terms and conditions of the warranty.
• Price: Of course, price is always a consideration. Modified 351 engines can range in price from a few thousand dollars to upwards of ten thousand dollars, depending on the level of modification and the quality of the components. Be sure to compare prices from different builders and consider the overall value of the engine.

Where to Find Ford 351 Modified Engines for Sale

Now that you know what to look for, it's time to start your search. Here are some of the best places to find Ford 351 modified engines for sale:

• Online Marketplaces: Websites like eBay, Craigslist, and Facebook Marketplace can be good sources for finding used or rebuilt engines. However, it's important to be cautious when buying from these sources, as you'll need to carefully vet the seller and the engine's condition.
• Performance Engine Builders: Many performance engine builders specialize in building modified 351 engines. These builders typically offer a range of engines to choose from, and they can also custom-build an engine to your specifications. Some popular performance engine builders include Ford Performance Solutions, Coast High Performance, and Summit Racing.
• Automotive Swap Meets: Automotive swap meets are a great place to find deals on used and rebuilt engines. You'll need to do some digging to find the right engine, but you might be able to score a great deal.
• Online Forums and Communities: Online forums and communities dedicated to Ford vehicles can be a valuable resource for finding engines for sale. These forums often have classifieds sections where members can buy and sell parts.

Common Modifications for Ford 351 Engines

To give you a better understanding of what goes into a modified 351 engine, here's a rundown of some of the most common modifications:

• Cylinder Head Porting and Polishing: Porting and polishing the cylinder heads improves airflow into and out of the engine, resulting in increased horsepower and torque.
• Performance Camshaft: A performance camshaft increases the valve lift and duration, allowing more air and fuel to enter the cylinders. This can significantly increase horsepower and torque, but it can also affect the engine's idle quality.
• Upgraded Intake Manifold: An upgraded intake manifold provides a more direct and efficient path for air and fuel to enter the cylinders. This can improve throttle response and increase horsepower.
• Electronic Fuel Injection (EFI): EFI replaces the carburetor with a computer-controlled fuel injection system. EFI offers several advantages over carburetors, including improved fuel economy, throttle response, and cold starting.
• Forged Pistons and Connecting Rods: Forged pistons and connecting rods are much stronger than their cast counterparts, making them ideal for high-performance engines that will be subjected to high levels of stress.
• Upgraded Exhaust System: An upgraded exhaust system reduces backpressure, allowing the engine to breathe more freely. This can increase horsepower and torque, and it can also improve the engine's sound.
• High-Performance Ignition System: A high-performance ignition system provides a stronger spark, which can improve combustion and increase horsepower. Common upgrades include MSD ignition boxes and high-performance distributors.

Tips for Maintaining Your Ford 351 Modified Engine

Once you've invested in a modified 351 engine, it's important to take care of it properly to ensure its longevity and performance. Here are some tips for maintaining your engine:

• Regular Oil Changes: Change the oil and filter regularly, following the manufacturer's recommendations. Use a high-quality synthetic oil specifically designed for performance engines.
• Proper Cooling System Maintenance: Keep the cooling system clean and properly maintained. Flush the coolant regularly and inspect the hoses and radiator for leaks.
• Spark Plug Maintenance: Replace the spark plugs regularly, following the manufacturer's recommendations. Use spark plugs that are specifically designed for performance engines.
• Valve Adjustments: If your engine has adjustable valves, check and adjust them regularly. This will ensure that the valves are opening and closing properly, which is essential for optimal performance.
• Fuel System Maintenance: Keep the fuel system clean and properly maintained. Use a fuel stabilizer to prevent fuel from deteriorating, and replace the fuel filter regularly.
• Monitor Engine Parameters: Keep an eye on the engine's vital signs, such as oil pressure, coolant temperature, and voltage. This will help you identify any potential problems early on.

Conclusion

A Ford 351 modified engine can be a fantastic upgrade for your vehicle, providing a significant boost in power and performance. By doing your research, choosing a reputable engine builder, and properly maintaining your engine, you can enjoy years of reliable performance and excitement. So go out there and find the perfect 351 engine for your project – you won't regret it!