Early Bronco 23 Gallon Fuel Tank

---

Early Bronco Long Range Fuel Tank – FAQ

---

What year model Early Broncos do these high capacity fuel tanks fit?

These long range fuel tanks are designed for 1966-77 Ford Broncos and install in the factory rear tank location. They work with stock frames and most common suspension and exhaust setups.

---

How much additional range does a high capacity Bronco gas tank provide?

Compared to the original 13 gallon rear tank, a larger-capacity replacement adds significant driving range. At 23 gallons capacity, these tanks provide greater capacity than the factory dual-tank setup while using a single rear tank.

Below is a simple range breakdown using an expected ~12 MPG baseline for a mostly stock 1966-77 Ford Bronco with a factory 302 V8. This 12 MPG figure lines up with common published/real-world averages (often roughly 11–13 MPG depending on gearing, tires, tune, and driving).

Rear Tank	Front Auxiliary Tank (8 gallons)	Total Fuel Capacity (gallons)	Est. Fuel Range (miles @ 12 MPG)
23 Gallon High Capacity Tank	Yes	31	372
23 Gallon High Capacity Tank	No	23	276
13 Gallon Stock Tank	Yes	21	252
13 Gallon Stock Tank	No	13	156

---

Can a long range rear tank be used with the factory front auxiliary tank?

Yes. Our high capacity rear fuel tanks can be paired with the original front auxiliary tank to extend range even further. This setup is popular for long-distance driving, trail runs, and overland-style use. 

Fuel Injection Note: For fuel-injected setups, the most common plumbing method uses a transfer pump to move fuel from the auxiliary tank to the rear main tank. This approach helps prevent fuel starvation and eliminates issues that can occur when switching between tanks.

---

Is modification required to install a larger fuel tank in my Early Bronco?

Our high capacity Early Bronco fuel tanks are designed as direct-fit replacements. Minor adjustments may be needed depending on exhaust routing, lift height, or aftermarket components already installed.

---

Will my stock fuel gauge work with these tanks?

Yes. We provide an upgraded reed style fuel sending unit with our M1A1 Early Bronco 23 gallon Gas Tank. This sending unit is set to the factory 10-75 ohms and features a wiring pigtail that plugs directly into the factory sending unit wiring.

---

Are these tanks suitable for off-road use?

Absolutely! These fuel tanks are built specifically for Early Broncos and are designed for trail use. Our tanks include an internal baffle design that reduces fuel slosh and their heavy duty 14-gauge stainless steel construction and optional 3/16" thick skid plate ensure your tank is ready to handle the trail like a champ!

---

How is ground clearance compared to stock?

Our high capacity rear gas tanks are designed to preserve ground clearance while adding fuel capacity. Although the tank sits slightly lower than the stock unit, the rear is angled to match the Early Bronco’s approach geometry, helping reduce hang-ups when climbing or descending obstacles.

---

Is a single high capacity tank better than factory dual tanks?

For many Bronco owners, a single long range tank simplifies fuel management, eliminates tank switching issues, and still delivers the range needed for extended trips. If you are looking to max out your fuel range, grab a 23-gallon tank and add the 8-gallon auxiliary fuel tank to your 66-77 Bronco.

---

Are these fuel tanks compatible with EFI conversions?

We offer the M1A1 Early Bronco 23 gallon fuel tank in an EFI-specific configuration designed to support modern fuel injection systems. These tanks use an in-tank fuel pump assembly that maintains consistent fuel pressure and reduces the risk of cavitation or fuel starvation, especially during low fuel conditions or off-camber driving. In-tank pumps also run cooler and quieter than frame-mounted pumps, improving overall reliability for EFI conversions.

---