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

The Ford F-Series F-100, equipped with the 4.9-liter (300 cubic inch) inline-six engine producing 170 horsepower, represented a workhorse offering within the fifth generation of Ford’s immensely popular pickup truck line. Produced for the 1966 and 1967 model years, this configuration occupied a middle ground in the F-100 lineup, offering a balance between affordability, durability, and capability. It served as a crucial component of Ford’s strategy to cater to a broad spectrum of buyers, from farmers and ranchers to tradesmen and everyday users. This variant was positioned below the more powerful V8 options, but above the base six-cylinder engines in terms of both price and performance.

Technical Specifications

Powertrain & Engine Architecture

The heart of this F-100 variant was the 4.9-liter (300 cu. in.) inline-six engine, internally designated as the 300 I6. This engine was a long-stroke design, known for its robust construction and impressive low-end torque. The 300 I6 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 170 horsepower output was achieved at 3600 rpm, while peak torque of 384 Nm (283 lb-ft) arrived at 2400 rpm. This torque curve made the engine particularly well-suited for hauling and towing. The engine was mounted longitudinally in the chassis, driving the rear wheels through a three-speed manual transmission. While an automatic transmission was available as an option, the three-speed manual was a common pairing for this engine, particularly in work-oriented applications.

Driving Characteristics

The 170 hp 4.9-liter F-100 offered a practical, if not exhilarating, driving experience. Acceleration was modest, but the engine’s strong low-end torque provided ample power for everyday driving and hauling moderate loads. The three-speed manual transmission required deliberate shifting, but offered good control. Compared to the V8-powered F-100s, this variant felt less powerful, especially at higher speeds. However, it also offered better fuel economy and a simpler mechanical layout. The gear ratios in the three-speed manual were geared towards maximizing torque and pulling power, rather than achieving high-speed performance. The overall driving experience was characterized by its ruggedness and dependability, rather than refinement.

Equipment & Trim Levels

The F-100 with the 300 I6 engine typically came with a fairly basic level of equipment. Standard features included a simple vinyl bench seat, a basic instrument cluster, and a heater. Options included a radio, upgraded interior trim, and various convenience items. Trim levels were relatively limited in 1966-1967. The F-100 was generally offered in a single trim level, with options allowing buyers to customize their truck to some extent. The focus was on functionality and durability, rather than luxury. The interior was designed to withstand heavy use and was easily cleaned.

Chassis & Braking

The F-100 chassis was a traditional body-on-frame design, providing a robust and durable platform. The front suspension utilized independent coil springs, while the rear suspension employed leaf springs. This setup provided a comfortable ride, even when the truck was loaded. Braking was accomplished via drum brakes on all four wheels. Steering was handled by a recirculating ball steering system. Power steering was available as an option, but was not standard equipment. The tires were typically 215/75 R15 or 225/75 R15, providing adequate grip for most road conditions.

Market Reception & Comparison

The 170 hp 4.9-liter F-100 was well-received by buyers who prioritized durability and affordability. Critics praised the engine’s reliability and low-end torque, but noted its lack of outright power compared to the V8 options. Fuel economy was considered reasonable for the time, although it was not a primary selling point. Compared to the 352 cubic inch V8, the 300 I6 offered significantly less horsepower and acceleration, but it was also less expensive to purchase and maintain. The 300 I6 was also considered more reliable than some of the larger V8 engines. This variant appealed to buyers who needed a capable work truck without the added cost and complexity of a V8.

Legacy

The 4.9-liter inline-six engine proved to be exceptionally durable and reliable, earning a reputation as one of Ford’s most long-lasting engines. Many examples of this engine are still in service today, decades after their original production date. The 1966-1967 F-100 with the 300 I6 has become a popular choice among classic truck enthusiasts, prized for its simplicity, affordability, and rugged character. Parts availability remains relatively good, making it easier to maintain and restore these trucks. In the used car market, these F-100s typically command modest prices, reflecting their age and basic equipment levels. However, well-maintained examples are increasingly sought after by collectors and enthusiasts.