1968-1972 Ford F-Series F-100 V 6.4 390 V8 (255 Hp) Automatic

The Ford F-100, produced from 1953 to 1972, represented a cornerstone of Ford’s truck lineup and a significant presence in the American light-duty pickup market. The variant featuring the 6.4-liter (390 cubic inch) V8 engine paired with an automatic transmission – specifically the Cruise-O-Matic – was offered between 1968 and 1972, falling within the fifth generation of the F-Series (often referred to as the F-100 V). This configuration occupied a mid-range position within the F-100 lineup, offering a balance between capability and convenience for buyers who needed more power than the inline-six options but didn’t require the larger engines found in the F-250 and F-350 models.

Technical Specifications

Powertrain & Engine Architecture

The heart of this F-100 variant was the Ford 390 cubic inch (6.4-liter) V8 engine, designated within the Ford family as the FE-series engine. This engine was a robust and relatively simple design, utilizing a cast iron block and cylinder heads. The 390 featured a 8.6:1 compression ratio and employed a two-barrel carburetor for fuel delivery. The valvetrain consisted of a hydraulic lifter camshaft, offering a balance between performance and reduced maintenance. The engine produced 255 horsepower at 4,400 rpm and 510 Nm (376 lb-ft) of torque at 2,600 rpm. The Cruise-O-Matic automatic transmission, a three-speed unit, was the standard transmission offering for this engine. It was known for its smooth operation, though it wasn’t particularly fuel-efficient by modern standards. The transmission was column-shifted, a common feature for trucks of this era.

Driving Characteristics

The 390 V8 and Cruise-O-Matic combination provided a noticeable step up in performance compared to the F-100’s standard inline-six engines. While not a performance-oriented setup, it offered ample power for hauling moderate loads and comfortable highway cruising. The automatic transmission, while convenient, did result in some power loss compared to the available manual transmissions. The gear ratios were optimized for torque delivery, making it well-suited for work applications. Acceleration was adequate, but the truck’s weight and the transmission’s characteristics meant it wasn’t particularly quick. The rear-wheel-drive configuration and relatively soft suspension provided a comfortable ride, but handling was typical for a full-size pickup of the period – somewhat vague and prone to body roll.

Equipment & Trim Levels

The 1968-1972 F-100 with the 390 V8 and automatic transmission 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 air conditioning, a radio, and upgraded interior trim. The trim level could vary, with some models featuring chrome exterior accents and more luxurious interior materials. The F-100 offered a range of bed lengths and cab configurations (standard, SuperCab) to suit different needs. Power steering and power brakes were often optional extras, adding to the convenience and ease of driving.

Chassis & Braking

The F-100 chassis was a traditional body-on-frame design, providing durability and ease of repair. The front suspension utilized independent coil springs, offering a relatively comfortable ride. The rear suspension consisted of leaf springs, designed to handle heavier loads. Braking was accomplished via drum brakes on all four wheels, which were adequate for the truck’s weight and intended use, but lacked the stopping power of modern disc brake systems. Steering was handled by a cone worm and recirculating ball system, providing a somewhat indirect steering feel. The truck’s tires were typically bias-ply construction, offering good durability but less grip than radial tires.

Market Reception & Comparison

The 390 V8/automatic F-100 was generally well-received by buyers who needed a capable and comfortable pickup truck. Critics praised the engine’s power and torque, but noted that the automatic transmission reduced fuel economy. Compared to the smaller inline-six engines, the 390 offered a significant performance advantage, making it ideal for towing and hauling. Compared to the larger engines available in the F-250 and F-350, the 390 provided a good balance between power and affordability. The 390 was also considered more reliable than some of the larger, more complex Ford V8 engines of the era. Fuel economy, even for the time, was a noted drawback, averaging around 12-15 mpg in typical driving conditions.

Legacy

The Ford F-100 with the 390 V8 and Cruise-O-Matic transmission has become a popular choice among classic truck enthusiasts. The 390 FE engine is known for its durability and relative simplicity, making it a relatively easy engine to maintain and rebuild. Parts availability is generally good, although some specific components can be difficult to find. These trucks are often sought after for restoration projects and are valued for their classic styling and robust construction. While not the most powerful or fuel-efficient F-100 variant, the 390 V8/automatic combination represents a sweet spot in the lineup, offering a good balance of performance, comfort, and reliability. Today, well-maintained examples command a respectable price in the used car market, reflecting their enduring appeal and historical significance.