BROTHERS ESM6366 Engine Mount Conversion Block Kit 090127214541 V8

( Brand: Brothers ), ( Manufacturer Part Number: ESM6366 ), ( Part Type: Engine Mount Block ), ( UPC: 090127214541 )

Review BROTHERS Trucks Engine Mount Conversion Kit Small Block V8 Black

The **Brothers ESM6366 Engine Mount Conversion Kit for Block V8 Engines** is a meticulously engineered solution designed to transform the stock suspension and mounting system of classic Ford V8 engines into a more robust, adjustable, and performance-oriented setup. Ideal for enthusiasts restoring or modifying their **302, 351 Cleveland, 351 Windsor, 428 Cobra Jet, 429 Super Cobra Jet, or 460 Big Block** applications, this kit replaces the factory rubber engine mounts with a trio of high-quality steel mounts that not only enhance durability but also allow for precise engine positioning and alignment. Crafted from heavy-duty steel, these mounts are built to withstand the rigors of high-performance driving, aggressive launches, and prolonged use under heavy loads, ensuring long-term reliability without the flex or wear associated with OEM rubber components. The kit includes a **steel engine cradle** that securely cradles the engine block, reducing vibration transfer to the chassis and improving overall rigidity, while the **adjustable mount brackets** enable fine-tuning of the engine s height, angle, and fore-aft position, allowing for optimal drivetrain alignment and suspension geometry. Whether you're aiming for a smoother ride, improved handling, or better engine bay access for maintenance, this conversion kit provides a clean, factory-inspired upgrade that maintains the integrity of your vehicle s original design while elevating its performance capabilities. Perfect for **restomod builds, drag racing, street rod projects, or daily drivers** seeking a firmer, more controlled ride, the ESM6366 kit is a game-changer for anyone looking to move beyond stock limitations while preserving the timeless appeal of their Block V8-powered classic.

**Pros and Cons of buying a Brothers ESM6366 Engine Mount Conversion Kit for a Block V8**

The Brothers ESM6366 is a popular engine mount conversion kit designed to improve the fitment, alignment, and performance of a Block V8 engine (commonly found in GM LS-based engines) in various applications, including street rods, custom builds, and performance vehicles. Below is a detailed breakdown of its advantages and disadvantages.

---

### **Pros**

1. **Improved Engine Mounting and Alignment**

The kit replaces stock or aftermarket mounts that may not provide proper support, leading to excessive flex, binding, or misalignment. The ESM6366 mounts are designed to cradle the engine more securely, reducing stress on the engine block and transmission. This can help prevent warping of the bellhousing or engine block over time, which is a common issue with poorly supported LS engines.

2. **Better Vibration Dampening**

Stock mounts and even some aftermarket options can transmit excessive vibration into the chassis, leading to rattles, driveline angles, and premature wear on components like the driveshaft or exhaust. The ESM6366 mounts are engineered with rubber inserts that better isolate vibrations, resulting in a quieter and more stable ride.

3. **Customizable Fitment**

The kit is designed to work with a wide range of frame rails, subframes, and chassis configurations, including those from GM, Ford, Chevy, and custom builds. It includes adjustable features (such as bolt patterns and mounting points) that allow for fine-tuning to match specific vehicle applications. This flexibility makes it suitable for both stock-like restorations and aggressive custom builds.

4. **Enhanced Driveline Angles**

Properly aligned engine mounts ensure that the driveshaft, transmission, and rear axle are in the correct angles, reducing driveline vibration and wear. The ESM6366 kit helps achieve these angles, which is critical for smooth operation, especially in high-performance applications.

5. **Durability and Build Quality**

Brothers Engine Mounts are known for their robust construction, using high-quality materials and precise machining. The mounts are designed to handle the stresses of high-performance engines, including those with forced induction or heavy loads. The kit includes steel brackets and heavy-duty rubber bushings that are built to last.

6. **Compatibility with Aftermarket Components**

The kit is often used in conjunction with other aftermarket parts, such as custom frames, transmission housings, or performance engines. Its modular design allows for easy integration with components like the ESM6366 transmission tunnel or other Brothers products, creating a cohesive support system.

7. **Reduced Risk of Engine Damage**

Poorly supported engines can suffer from flexing, which may lead to cracked bellhousings, warped crankshafts, or damaged transmission housings. The ESM6366 kit minimizes these risks by providing a rigid yet flexible support structure.

8. **Ease of Installation**

While installation can be labor-intensive (as with most engine mount conversions), the ESM6366 kit comes with detailed instructions and is designed to be straightforward for experienced mechanics. The kit includes all necessary hardware, reducing the need for additional purchases.

9. **Positive Community and Support**

Brothers Engine Mounts has a strong reputation in the custom car and performance community. Many builders and mechanics have successfully used the ESM6366 kit, and there is ample online support, forums, and tutorials available for troubleshooting or guidance.

10. **Long-Term Cost Savings**

By preventing issues like warping, driveline vibration, or engine damage, the kit can save money in the long run by avoiding costly repairs or replacements down the line.

---

### **Cons**

1. **High Upfront Cost**

The ESM6366 kit is not a cheap investment. Depending on the specific configuration and additional components (such as the transmission tunnel or extra mounts), the cost can range from $500 to over $1,000. This makes it a significant expense for builders on a tight budget.

2. **Complex Installation**

Installing engine mounts requires removing the engine, transmission, and often the driveshaft, which is a major undertaking. The process involves welding, drilling, and precise alignment, all of which require mechanical skill and access to proper tools. Beginners or those without experience in engine work may find the installation daunting.

3. **Potential for Misalignment if Not Installed Correctly**

While the kit is designed to improve alignment, improper installation can lead to new issues, such as driveline angles that are too aggressive or mounts that are not level. This can result in driveline vibration, transmission binding, or even damage to the engine or transmission.

4. **Compatibility Issues with Certain Applications**

Although the ESM6366 kit is versatile, it may not be a perfect fit for every vehicle or build. For example, vehicles with very narrow frame rails, unique subframe designs, or aggressive custom builds may require additional modifications or custom fabrication to achieve a proper fit. In some cases, alternative mount kits (such as those from other manufacturers) may be more suitable.

5. **Weight Addition**

The steel brackets and rubber bushings add noticeable weight to the vehicle. While this is generally negligible in most applications, it may be a consideration for extreme performance builds where weight reduction is critical.

6. **Potential for Rust or Material Failure Over Time**

While Brothers Engine Mounts are well-built, exposure to moisture, road salt, or extreme temperatures can lead to rust or degradation of the rubber bushings. Regular maintenance and inspection are necessary to ensure longevity.

7. **Limited Aftermarket Support for Custom Builds**

If a builder deviates significantly from the intended application (e.g., using non-standard frame rails or transmission tunnels), finding compatible parts or support may be more difficult. Custom fabrication may be required to address unique fitment challenges.

8. **Time-Consuming to Remove and Replace**

If a bushing fails or the mounts need adjustment, removing and replacing them can be a time-consuming process, especially if the engine and transmission are already installed. This may require redoing the entire mount conversion.

9. **Not a Universal Solution**

While the ESM6366 kit is highly adaptable, it is not a one-size-fits-all solution. Builders must carefully plan their application to ensure the mounts will work with their specific vehicle geometry, engine setup, and driveline configuration.

10. **Potential for Overkill in Some Applications**

For stock or lightly modified vehicles, the ESM6366 kit may be more than necessary. In such cases, simpler or less expensive mount solutions (such as stock mounts or basic aftermarket options) might suffice without the added cost and complexity.

---

### **Ending Conclusion**

The Brothers ESM6366 Engine Mount Conversion Kit is one of the most highly regarded and widely used solutions for properly supporting a Block V8 engine in custom builds, restorations, and performance applications. Its strengths lie in its ability to improve engine alignment, reduce vibration, and enhance driveline angles, all of which contribute to a smoother, more durable, and more reliable setup. The kit s durability, customizability, and compatibility with a broad range of vehicles make it a favorite among serious builders.

However, the kit is not without drawbacks. The high cost, complex installation, and potential for misalignment if not installed correctly are significant considerations. Additionally, it may not be the best choice for every application, particularly in cases where budget, time, or vehicle-specific constraints make it impractical.

For builders who prioritize long-term reliability, performance, and a high-quality support system for their Block V8 engine, the ESM6366 kit is an excellent investment. It is particularly well-suited for:

- Custom street rods and hot rods.

- High-performance builds with aggressive driveline angles.

- Restorations where stock mounts are inadequate.

- Applications where engine and transmission support are critical to preventing damage.

For those on a tighter budget or working with simpler builds, alternative mount solutions may be more appropriate. Ultimately, the decision to purchase the ESM6366 kit should be based on a careful assessment of the build s requirements, the builder s experience level, and the long-term goals for the vehicle.

---

### **Recommendation**

If you are undertaking a Block V8 build or restoration where proper engine support is critical especially if you are using a custom frame, aggressive driveline angles, or a high-performance engine the Brothers ESM6366 Engine Mount Conversion Kit is highly recommended. Its benefits in terms of alignment, vibration reduction, and durability far outweigh the challenges for most serious builders.

1. Your vehicle s frame and driveline configuration are compatible with the kit (or that you are prepared to make necessary modifications).

2. You have the mechanical skill or access to a skilled mechanic to install the kit correctly.

3. You are willing to invest the time and resources required for a proper installation.

If your build is simpler or you are working with a stock-like setup, consider whether the ESM6366 is truly necessary, as there may be more cost-effective alternatives. However, for those who demand the best in engine support and longevity, the ESM6366 is a proven and reliable choice.

Details:

Compatible with 1963-1967 Chevrolet/GMC C-Series Truck Suburban RWD. 2WD applications only. This kit will also enable you to run solid motor mounts in high performance applications. This kit is designed to mount the original cross member frame mounting holes on SBC V8 trucks and allow use of side car engine mounts.

part #: esm6366 prices

• $266.17-$288.65

specifications engimou:

• brand: Brothers
• mpn: Esm6366
• part type: Engine Mount Block
• upc: 090127214541

general engimou:

• Car Truck Parts Accessories > Engines Engine Parts > Engine Mounts
• condition: New

returns engimou:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

payments engimou:

• other
• wallet: Paypal
• credit card: Visa

shipping engimou:

• service: UPS Ground
• transit: 7-13 Days
• class: Standard
• type: Calculated
• cost: $0.00
• carrier: UPS

offer engimou:

• sold: 0
• options: Ship-to-home
• quantity: 9
• started: March 25, 2026
• availability: In Stock

seller engimou:

• rating: 88.2%
• city: Lehi, Utah
• # reviews: 422

Brothers ESM6366 Is Similar To:

• Brothers Trucks Esm6372 Motor Mount For Chevy Suburban Chevrolet C10 C20 Jimmy (43.4% similar) These engine mounts are made from steel and feature a black powder coated finish. This kit will also enable you to run solid motor mounts in high performance applications. Conversion motor mounts for small block V8. 2WD applications only. Allows use of side mount - car small block v8 engine mounts. ...(April 9th, 2025)
• Brothers Trucks Ecm4759 Engine Crossmember (46.6% similar) Note some welding is required. 3-PIECE set with black painted finish.; menu. Use with side bolt motor mounts. Buyer pays return shipping. Compatible with 1947-1959 Chevrolet/GMC truck: this universal cross member bolts or welds directly to your frame rails and allows the conversion from a inline 6-...(October 11th, 2025)