AC 6433620 Nos Supreme Gm Gas Fuel Gauge 6431664

( Brand: Ac ), ( Color: Black ), ( Material: Yes ), ( California Prop 65 Warning: Warning ), ( Unit Of Measure: Full ), ( Type: Fuel Gauge ), ( Ipn: 6431664 ), ( Display Type: Analog ), ( Style: Vintage ), ( Features: Box ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review AC Nos Oldsmobile Supreme Gm Gas Fuel Gauge Free Sh fits CUTLASS 1974

The **1974 Oldsmobile Cutlass Supreme** features a classic and highly sought-after **GM gas fuel gauge assembly**, specifically the **AC 6431664** unit, which includes the **NO. 1974** gauge itself along with the essential supporting components: the **6431899 fuel sender unit** and the **6433620 gauge sender cable**. This meticulously crafted fuel gauge assembly is a perfect fit for the iconic **Cutlass Supreme**, a model known for its refined luxury and powerful performance during its era. The **NO. 1974 fuel gauge** is a sleek, analog instrument with a polished chrome or black bezel, depending on the trim level, designed to seamlessly integrate into the dashboard s classic styling. The gauge itself is a precision-engineered piece, featuring a smooth, rotating needle that provides real-time fuel level readings with accuracy and reliability. The **6431899 fuel sender unit** is a robust, float-operated mechanism that sits within the fuel tank, sending electrical signals to the gauge to indicate fuel levels. This sender is built to withstand the demands of daily driving, ensuring consistent performance over time. Complementing the sender is the **6433620 gauge sender cable**, a high-quality wiring harness that connects the sender unit to the gauge, delivering a clean and stable signal without interference. Together, these components form a complete, functional fuel system that not only enhances the aesthetic appeal of the Cutlass Supreme s dashboard but also ensures reliable operation. Whether restoring a vintage Cutlass Supreme to its former glory or maintaining one as a cherished classic, this **GM fuel gauge assembly** is an essential part of preserving the car s original functionality and timeless charm. Its compatibility with the **1974 model year** ensures a perfect fit, allowing enthusiasts to enjoy the seamless blend of style and performance that defines this legendary American automobile.

### **Pros and Cons of Buying a 1974 Oldsmobile Cutlass Supreme with the Specified Parts**

#### **Pros**

1. **Classic American Muscle Car Appeal**

The 1974 Oldsmobile Cutlass Supreme is a well-regarded muscle car from the early 1970s, known for its aggressive styling, comfortable ride, and strong performance in its day. It holds nostalgic value for enthusiasts who appreciate the era s automotive design and engineering.

2. **Reliable Engine Options (Depending on Modifications)**

The Cutlass Supreme was available with several V8 engines, including the **350 CID (5.7L) Rocket V8**, which was a solid performer when properly maintained. If the engine has been rebuilt or restored, it could provide decent power and longevity.

3. **Spacious and Comfortable Interior**

The Cutlass Supreme offered a roomy cabin with comfortable seating, making it a practical choice for daily driving beyond just performance. The interior materials (vinyl, carpet, and woodgrain trim) are durable and easy to maintain.

4. **Available Performance Parts Market**

Due to its popularity, parts like the **fuel gauge (6431899), fuel sender unit (6433620), and AC compressor (6431664)** are relatively easy to find, especially from aftermarket suppliers or junkyards. This makes repairs and upgrades more accessible.

5. **Potential for Restoration or Modification**

If the car is in rough shape, it can be a rewarding project. The Cutlass Supreme is a common restoration target, and with the right effort, it can become a reliable, high-performance classic.

6. **Lower Purchase Price Compared to Modern Classics**

Since it s an older model, the upfront cost is typically lower than that of more sought-after muscle cars (e.g., Camaros, Challengers, or Mustangs). This makes it a more budget-friendly option for enthusiasts.

7. **Good Handling for Its Era**

The Cutlass Supreme was designed with a focus on both comfort and sportiness, featuring a solid live rear axle and proper suspension tuning. With modern upgrades (shocks, bushings, sway bars), it can handle better than many contemporaries.

---

#### **Cons**

1. **Age and Wear-and-Tear Risks**

At nearly 50 years old, the car likely has significant mileage and wear in critical components like the **transmission, suspension, and drivetrain**. Rust, especially in the frame and floor pans, is a major concern for this era.

2. **Fuel Economy Concerns**

The **350 CID V8** (and other big-block engines of the time) was not fuel-efficient by modern standards, averaging around **12-15 MPG** in the 1970s. Gasoline prices today make long-distance driving expensive.

3. **Emissions and Modern Compliance Issues**

The Cutlass Supreme was not built to meet modern emissions standards. If you plan to drive it legally in most states, you ll need a **smog-certified engine** or a **restored emissions system**, which can be costly and difficult to achieve.

4. **Fuel Gauge and Sender Unit Reliability**

The **fuel gauge (6431899) and sender unit (6433620)** are common points of failure in older GM vehicles. If these parts are faulty, the gauge may not work at all, leading to fuel starvation and potential engine damage.

5. **AC Compressor (6431664) May Be Weak**

The **AC compressor** in this model is likely old and may not hold pressure well. If the system hasn t been serviced in years, it could fail entirely, leaving you without climate control in hot weather.

6. **High Maintenance Costs**

Replacing worn-out parts (bushings, ball joints, timing belt, water pump) will be expensive, especially if original components are no longer available. Many aftermarket parts may not fit perfectly or last long.

7. **Safety Concerns**

Modern safety standards (airbags, crumple zones, ABS) were nonexistent in 1974. The Cutlass Supreme lacks modern safety features, making it less safe in a collision compared to today s vehicles.

8. **Insurance and Registration Challenges**

Insuring a classic car can be difficult and expensive, especially if it s not properly documented as a collector s item. Some states have restrictions on older vehicles without modern safety equipment.

9. **Limited Modern Compatibility**

Many aftermarket parts (wiring harnesses, sensors, fuel injectors) are designed for newer vehicles. Retrofitting modern electronics (ECU, fuel system) can be complex and costly.

10. **Project Car Reality**

If the car is not already in good condition, it may require **thousands of dollars in repairs** before it s roadworthy. This makes it more of a **project car** than a ready-to-drive vehicle.

---

### **Ending Conclusion**

- You are an **enthusiast who enjoys restoration projects** and have the time/money to bring it back to life.

- You plan to **drive it occasionally** for fun rather than daily use.

- You are prepared for **high maintenance costs** and potential reliability issues.

- You find a **well-documented, previously restored example** with a clean title and service records.

However, if you are looking for a **reliable, low-maintenance, or modern-compliant vehicle**, this car is **not the best choice**. The **fuel gauge and sender unit issues**, **emissions concerns**, and **general age-related wear** make it more of a **challenge than a practical purchase** unless you are fully committed to the restoration process.

---

### **Recommendation**

- **Buy a restored example** with a **clean title, service history, and emissions compliance**.

- **Budget for at least $5,000 $10,000 ** depending on condition.

- **Replace the fuel sender unit and gauge immediately** if they are faulty.

- **Check for rust** in critical areas (frame, subframe, fuel tank).

- **Consider a modern fuel system upgrade** if emissions compliance is a concern.

- **Avoid this project** unless you are willing to invest significant time and money.

- **Consider a newer classic** (e.g., 1980s 1990s GM muscle car) that may be more reliable and easier to maintain.

- **Look for a modern muscle car** (e.g., Ford Mustang, Chevrolet Camaro) if you want performance without the hassle.

This Cutlass Supreme has **strong potential as a restoration project** but is **not a sound purchase for most everyday drivers**. If you are passionate about classics and prepared for the challenges, it can be a rewarding buy. Otherwise, seek a **more modern or better-documented example** of a similar vehicle.

Details:

You are buying on a NOS 1974 Oldsmobile Cutlass Supreme GM Gas Fuel Gauge 6431899 6433620 Free SH. It is NOS in the factory box, but box extremely tattered from storage pictured. I only ship to the lower 48 states. Happy buying!, Yellow/BlAck Bin 2.

I am selling off a life long collection of parts.

part #: 6433620 prices

• $28.95-$79.96

specifications boosttempgauges:

• for models: Cutlass
• for makes: Oldsmobile
• for years: 1974
• brand: Ac
• color: Black
• material: Yes
• california prop 65 warning: Warning
• unit of measure: Full
• type: Fuel Gauge
• ipn: 6431664
• display type: Analog
• style: Vintage
• features: Box
• universal fitment: No
• country of origin: United States

offer boosttempgauges:

• started: May 13, 2026
• quantity: 1
• availability: In Stock
• best offers: True
• sold: 0
• options: Ship-to-home

general boosttempgauges:

• Interior Parts Accessories > Gauges > Individual Gauges
• condition: New other see details

returns boosttempgauges:

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

payments boosttempgauges:

• wallet: Google-pay
• other
• credit card: Mastercard

seller boosttempgauges:

• # reviews: 3241
• city: Thomasville, Georgia
• rating: 100.0%

shipping boosttempgauges:

• transit: 5-10 Days
• class: Standard
• cost: $0.00
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS

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