The Ford F-100, part of the broader F-Series lineup, occupied a crucial role in the American pickup truck market from 1953 to 1972. The variant featuring the 4.9-liter (300 cubic inch) inline-six engine, producing 165 horsepower, and equipped with four-wheel drive was produced from 1968 to 1972. This configuration represented a work-oriented, durable option within the F-100 range, aimed at buyers needing a capable truck for both on-road and off-road tasks. It bridged the gap between the lighter-duty F-100 models and the heavier-duty F-250, offering a balance of payload capacity and maneuverability.
Technical Specifications
| Brand | Ford |
| Model | F-Series F-100/F-150 |
| Generation | F-Series F-100 V |
| Type (Engine) | 4.9 300 Six (165 Hp) 4×4 |
| Start of production | 1968 |
| End of production | 1972 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 3 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Power | 165 Hp @ 3600 rpm |
| Power per litre | 33.6 Hp/l |
| Torque | 399 Nm @ 2000 rpm / 294.29 lb.-ft. @ 2000 rpm |
| Engine layout | Front, Longitudinal |
| Engine displacement | 4916 cm3 / 299.99 cu. in. |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 101.6 mm / 4 in. |
| Piston Stroke | 101.09 mm / 3.98 in. |
| Compression ratio | 8.8:1 |
| Fuel injection system | Carburettor |
| Engine aspiration | Naturally aspirated engine |
| Max. weight | 2540 kg / 5599.74 lbs. |
| Trunk (boot) space – minimum | 1274-2163 l / 44.99 – 76.39 cu. ft. |
| Fuel tank capacity | 74 l / 19.55 US gal | 16.28 UK gal |
| Length | 4636-5138 mm / 182.52 – 202.28 in. |
| Wheelbase | 2921-3327 mm / 115 – 130.98 in. |
| Wading depth | 658-660 mm / 25.91 – 25.98 in. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, manual transmission |
| Front suspension | Independent coil spring |
| Front brakes | Drum |
| Rear brakes | Drum |
| Steering type | Worm-reduction unit |
| Tires size | 215/75 R15; 225/75 R15 |
| Wheel rims size | 7J x 15 |
Powertrain & Engine Architecture
The heart of this F-100 variant was the 4.9-liter (300 cubic inch) inline-six engine. This engine, known internally as the 300 I6, was a long-stroke design renowned for its durability and low-end torque. It featured a cast iron block and cylinder head, and utilized a single two-barrel carburetor for fuel delivery. The valvetrain employed a conventional pushrod configuration. The 165 horsepower output was achieved at 3600 rpm, while peak torque of 399 Nm (294.29 lb-ft) arrived at a relatively low 2000 rpm. This torque curve made the truck particularly well-suited for hauling and towing. The four-speed manual transmission was a heavy-duty unit designed to handle the engine’s output and the demands of four-wheel drive operation. The 4×4 system employed a transfer case allowing the driver to switch between two-wheel drive and four-wheel drive modes, with a low-range gear for increased traction in challenging terrain.
Driving Characteristics
The 4.9-liter engine and four-speed manual transmission combination provided a practical, if not exhilarating, driving experience. Acceleration was modest, but the engine’s strong low-end torque made it capable of handling substantial loads. The four-speed manual offered a reasonable range of gear ratios, allowing the driver to keep the engine in its optimal power band. Compared to the optional V8 engines available in the F-100, this inline-six offered less peak horsepower, but it was generally more fuel-efficient and required less maintenance. The four-wheel drive system significantly enhanced the truck’s off-road capability, making it a popular choice for farmers, ranchers, and those who frequently encountered rough terrain. The steering, utilizing a worm-reduction unit, was known for its robustness but lacked the precision of more modern steering systems.
Equipment & Trim Levels
The 1968-1972 F-100 4×4 with the 300 six was typically offered in a fairly basic trim level, reflecting its work-oriented nature. Standard features included a simple vinyl bench seat, a basic instrument cluster, and a heater. Options were available, such as upgraded interior trim, a radio, and power steering. However, these were often considered luxuries rather than necessities. The exterior typically featured minimal chrome trim, and the paint options were generally limited to solid colors. The focus was on functionality and durability rather than aesthetics.
Chassis & Braking
The F-100 chassis was a traditional body-on-frame construction, providing a robust and durable platform. The front suspension utilized independent coil springs, offering a relatively comfortable ride for a truck of its era. The rear suspension employed leaf springs, which were well-suited for carrying heavy loads. Braking was accomplished via drum brakes on all four wheels. While adequate for the truck’s weight and intended use, the drum brakes lacked the stopping power and fade resistance of disc brakes. The tires, typically 215/75 R15 or 225/75 R15, were designed for a balance of on-road and off-road performance.
Market Reception & Comparison
The F-100 4×4 with the 300 six engine was well-received by buyers who prioritized durability, reliability, and affordability. Critics generally praised the engine’s torque and fuel efficiency, but noted its lack of outright power. Compared to the V8-powered F-100s, this variant offered a lower purchase price and reduced operating costs. It was a popular choice for those who needed a capable work truck without the expense of a larger engine. Fuel economy, while not exceptional by modern standards, was respectable for a four-wheel drive pickup truck of the era.
Legacy
The 4.9-liter inline-six engine continued in production for many years, becoming a mainstay of the Ford truck lineup. Its reputation for durability and reliability has made it a favorite among enthusiasts and mechanics alike. Today, well-maintained examples of the 1968-1972 F-100 4×4 with the 300 six engine are sought after by collectors and those looking for a classic American pickup truck. Parts availability remains relatively good, making it a viable option for restoration projects. The powertrain, while not particularly sophisticated by modern standards, is known for its longevity and relatively simple maintenance requirements. This specific configuration represents a significant piece of Ford’s truck history, embodying the values of ruggedness and dependability that have defined the F-Series for generations.
