1966-1967 Ford F-Series F-100 V 4.9 300 Six (170 Hp) 4×4

The Ford F-Series F-100, specifically the variant equipped with the 4.9-liter (300 cubic inch) inline-six engine producing 170 horsepower and featuring a four-wheel drive (4×4) system, was a significant offering within the fifth generation of Ford’s immensely popular pickup truck line. Produced for a relatively short period, from 1966 to 1967, this configuration represented a work-oriented, durable option for buyers needing a capable and reliable truck. It sat within a broader F-100 range that included various engine choices and trim levels, catering to a diverse customer base. This particular model was positioned as a robust, no-frills workhorse, appealing to farmers, ranchers, and those requiring a dependable vehicle for demanding tasks.

Technical Specifications

Powertrain & Engine Architecture

The heart of this F-100 variant was the 4.9-liter (300 cu. in.) inline-six engine. This engine, known internally as the “300 Six,” 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 barrel carburetor for fuel delivery. The engine’s 8.4:1 compression ratio contributed to its reliability and ability to run on regular gasoline. The 170 horsepower output was achieved at 3600 rpm, while peak torque of 384 Nm (283.22 lb-ft) arrived at 2400 rpm. This torque curve made it well-suited for hauling and towing. The engine was longitudinally mounted in the chassis. The four-speed manual transmission was a heavy-duty unit designed to handle the engine’s torque and the demands of four-wheel drive operation. The 4×4 system employed a mechanically operated transfer case, allowing the driver to switch between two-wheel drive and four-wheel drive as needed.

Driving Characteristics

The 170 hp, 4×4 F-100 was not a performance-oriented truck. Acceleration was modest, and its strength lay in its ability to tackle tough terrain and haul heavy loads. The four-speed manual transmission provided a reasonable range of gear ratios, allowing the driver to keep the engine in its optimal torque band. Compared to the optional V8 engines available in the F-100, this inline-six offered less outright power, but it was significantly more fuel-efficient and arguably more reliable. The 4×4 system provided enhanced traction in off-road conditions, making it a valuable asset for those working or recreating in challenging environments. The truck’s ride quality, even with the independent front suspension, was firm, reflecting its focus on utility rather than comfort.

Equipment & Trim Levels

The F-100 with the 4.9-liter engine and 4×4 drivetrain was typically offered in a fairly basic trim level. Standard features included a simple dashboard with basic gauges, a vinyl bench seat, and a sturdy metal bed. Options were available, such as a heater, upgraded upholstery, and a radio. However, this variant was generally geared towards buyers who prioritized functionality over luxury. The interior was designed for durability and ease of cleaning, reflecting its intended use as a work truck. The exterior typically featured minimal chrome trim and a utilitarian appearance.

Chassis & Braking

The F-100 chassis was a robust ladder frame construction, designed to withstand the stresses of heavy hauling and off-road use. The front suspension utilized independent coil springs, providing a degree of ride comfort and improved handling compared to earlier solid-axle designs. 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 of disc brakes. Steering was handled by a worm-reduction unit, which provided a solid feel but required considerable effort, especially at low speeds. Tires were typically 215/75 R15 or 225/75 R15, chosen for their durability and all-terrain capability.

Market Reception & Comparison

The 1966-1967 F-100 4×4 with the 300 Six engine was well-received by buyers who needed a dependable and affordable work truck. Critics praised its durability and low-end torque, but noted its lack of refinement and modest performance. Compared to the V8-powered F-100s, this variant offered better fuel economy and lower maintenance costs. It was a popular choice among farmers, ranchers, and construction workers who valued reliability and practicality over speed and comfort. The 300 Six engine became legendary for its longevity, often outlasting the rest of the truck.

Legacy

The 4.9-liter inline-six engine continued in production for decades, becoming a mainstay of Ford’s truck lineup. Its reputation for durability and reliability cemented its place in automotive history. Today, the 1966-1967 F-100 4×4 with the 300 Six engine is a sought-after classic truck, particularly among those who appreciate its simplicity and ruggedness. Well-maintained examples command a premium in the used car market. The powertrain, while not particularly powerful by modern standards, remains remarkably durable and relatively easy to maintain, making these trucks a popular choice for restoration projects and off-road enthusiasts. The engine’s longevity and readily available parts contribute to its continued appeal.