Early Bronco Performance Parts

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Top 10 Engine Upgrades for Your Early Bronco

Build Power. Drive Farther. Dominate the Trail.

Whether you’re trail crawling through the Rockies or cruising into town with a rumbling V8 under the hood, engine upgrades can take your Early Bronco from nostalgic to unstoppable. At WILD HORSES 4x4, we carry performance-driven components built to fuel your next adventure.

Here’s our no-nonsense guide to the Top 10 Engine Upgrades for your 1966–77 Ford Bronco - featuring trusted brands like Edelbrock, Holley, MSD, and PerTronix.

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1. EFI Fuel Injection System

Top Pick: Edelbrock Pro-Flo 4
Easy Install Option: Holley Sniper EFI

Want modern reliability and precise throttle control? Go EFI. The Edelbrock Pro-Flo 4 system gives your classic Bronco real-time fuel mapping, improved cold starts, and adaptive tuning. If you’re on a budget, the Holley Sniper EFI delivers excellent drivability and performance without breaking the bank.

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2. Holley Truck Avenger Carburetor

Still prefer to keep it carbureted? The Holley Truck Avenger 670 CFM is a proven workhorse for off-road Broncos. Its built-in fuel control features prevent flooding and stalling at steep angles, making it a go-to carb for trail rigs.

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3. Ceramic Shorty Headers + Stage 8 Locking Header Bolts & Remflex Gaskets

Stop chasing exhaust leaks. Aftermarket headers improve exhaust scavenging and unlock hidden horsepower. Pair them with Stage 8 Locking Header Bolts and Remflex Header Gaskets to keep everything tight, even under vibration and heat cycles.

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4. MSD Power Package

Budget Option: PerTronix Deluxe Ignition Kit

Spark is everything. The MSD Power Package offers reliable ignition timing, stronger spark, and better combustion—especially when paired with EFI or high-performance camshafts. Looking to save a few bucks? The PerTronix Deluxe Ignition Kit delivers a strong punch at a lighter price point.

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5. K&N Extreme Airflow Washable Air Cleaner

Let that small block breathe. The K&N Extreme Airflow Air Cleaner Assembly combines legendary filtration with increased airflow, boosting throttle response and power. It’s reusable, washable, and built to last.

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6. Edelbrock Performer Intake Manifold

Bolt-on power you can feel. The Edelbrock Performer Intake is engineered for low- to mid-range torque—perfect for trail rigs and daily drivers alike. It pairs beautifully with EFI or a well-tuned carb.

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7. Roller Rocker Arms

Reduce friction. Gain efficiency. Roller rocker arms help your engine rev more freely, reduce wear, and add subtle power increases. A solid upgrade for performance builds or rebuilds.

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8. Performance Fuel Pump

Fuel delivery matters. If you're running a built engine and fine-tuned carburetor, a high-flow mechanical fuel pump ensures your engine doesn’t starve when it matters most.

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9. M1A1 23-Gallon Fuel Tank

Speaking of fuel starvation - say goodbye to vapor lock and limited range. The M1A1 Fuel Tank offers increased capacity, improved venting, and a sleek fit. Designed with EFI conversions in mind, it’s trail-tough and built for modern fuel systems.

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10. Machined Spark Plug Wire Loom Kit + Boot Protectors

Keep your engine bay clean and functional. The Machine Spark Plug Wire Loom organizes your wires while the Spark Plug Boot Protectors prevents melting - add a slick touch to your valve cover layout.

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Bonus: Engine Swaps Worth the Hype

• Coyote 5.0L V8 Swap: Fuel-injected power, modern reliability, and 400+ horsepower potential.

• Explorer 5.0L Swap: A more affordable, plug-and-play friendly option that adds fuel injection, serpentine drive, and late-model performance.

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Ready to Build?

Whether you're going all-in with EFI or just giving your small block some breathing room, WILD HORSES 4x4 has the gear to take your Early Bronco from nostalgic to no-nonsense. Browse our full selection here, or give us a call and talk to fellow Bronco enthusiasts who know what works.

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