Chrysler 300 Letter Series F Convertible

Chrysler 300 Letter Series F Convertible

The 1960 Chrysler 300F represents a pivotal moment in American automotive engineering, introducing the innovative cross-ram induction system that would become one of the most celebrated engine configurations of the muscle car era. As the sixth installment of Chrysler's prestigious Letter Series, the 300F combined this engineering breakthrough with Virgil Exner's refined styling to create a vehicle that was simultaneously a technological showcase and a luxury grand tourer.

The star of the 300F was its 413-cubic-inch (6,768 cc) wedge-head V8, which departed from the previous hemispherical combustion chamber design in favor of a more production-friendly wedge configuration. To compensate and to push performance even further, Chrysler engineers developed the long-runner cross-ram intake manifold, which positioned two four-barrel Carter AFB carburetors on opposite sides of the engine with 30-inch intake runners crossing over the valley of the V8. This tuned intake configuration exploited resonance effects to dramatically improve cylinder filling at high RPM, producing 375 horsepower in standard form and an astonishing 400 horsepower in the optional short-ram configuration.

The 300F's styling marked the beginning of Chrysler's move away from the extreme tail fin designs of the late 1950s. The fins were more restrained than on the 300E, and the overall silhouette was cleaner and more sophisticated. The distinctive trapezoidal grille and the unique 300 Series crossed-flag emblems continued to distinguish the Letter cars from lesser Chryslers. The convertible variant, with its power-operated top, was the glamorous choice and is now the more coveted configuration.

Inside, the 300F offered swiveling front bucket seats with premium leather upholstery, an innovative feature that facilitated entry and exit. The full instrumentation included a 150-mph speedometer and a tachometer, reinforcing the car's dual personality as both luxury cruiser and high-performance machine. The TorqueFlite automatic transmission, standard equipment, was among the finest automatics of the era, with smooth shifts and surprising durability under the enormous torque loads of the 413 engine.

The 300F continued the Letter Series' racing heritage, though by 1960 the primary competitive arena had shifted from NASCAR's factory-backed era toward straight-line acceleration and speed record attempts. The cross-ram 300F was capable of genuine 140+ mph top speeds, an extraordinary figure for a full-size American convertible. Chrysler's engineers validated the design's potential with several speed record runs using 300F-based vehicles.

Production of the 300F totaled just 969 hardtop coupes and a mere 248 convertibles, making it among the rarest of the Letter Series cars. The convertible version is exceptionally scarce, and well-documented examples with the cross-ram intake system intact command significant premiums in the collector market. The 300F's significance as the car that introduced ram-induction technology to production vehicles ensures its permanent place in American automotive history.