The 1973 Pontiac Trans Am remains a definitive symbol of the golden era of American muscle. While original examples are highly prized, this custom build takes the iconic Firebird platform into a modern performance category. It successfully sheds the limitations of 1970s technology in favor of a reliable and potent powertrain. This restomod approach allows the driver to enjoy classic aesthetics without sacrificing the convenience of modern engineering.
Modern LS3 Power Under the Shaker Hood
The heart of this 1973 Pontiac Trans Am is a 6.2-liter LS3 V8 engine. This modern powerplant is a favorite among builders for its incredible power-to-weight ratio and vast aftermarket support. It breathes new life into the engine bay, providing a level of responsiveness the original smog-era engines lacked. Consequently, the car delivers a smooth yet violent acceleration that surprises anyone familiar with stock vintage Firebirds.
Refined Drivetrain for Effortless Cruising
Power travels to the rear wheels through a 4L60E four-speed automatic transmission. This electronically controlled gearbox is designed to handle the high torque output of the 6.2-liter engine with ease. It offers a significant upgrade over the original three-speed units by providing an overdrive gear for highway speeds. Therefore, this Trans Am is equally capable of dominating a drag strip or comfortably handling a long-distance road trip.
Sinister Black on Black Aesthetics
The exterior is finished in a deep black paint that accentuates the aggressive lines of the second-generation body. Every detail, from the flared wheel arches to the iconic rear spoiler, is presented with a mirror-like finish. This monochromatic theme extends to the black interior, creating a cockpit that feels both classic and intimidating. The matching interior components ensure that the cabin remains a cohesive space for the driver and passengers.
Suspension and Handling Characteristics
Handling a modern engine requires more than just original factory suspension components. While the listing focuses on the powertrain, these builds typically include reinforced chassis parts to manage the increased speed. The 1973 Pontiac Trans Am benefits from a lower stance that improves its center of gravity during cornering. This creates a more connected feel between the driver and the asphalt, making every turn a more engaging event.
Engine Specs and High Performance Numbers
This 1973 Pontiac Trans Am is powered by a 6.2L LS3 V8, an engine factory-rated at roughly 430 horsepower. It features modern fuel injection and an advanced cooling system to ensure reliability in various weather conditions. The 4L60E automatic transmission manages the shifts precisely, allowing the V8 to stay within its optimal power band. This setup provides a massive leap in performance over the original 1973 factory specifications.
Summary of the Glendale 2026 Entry
This custom build represents a perfect marriage of nostalgic design and contemporary mechanical prowess. It offers the next owner a turn-key experience with one of the most recognizable shapes in automotive history. The black-on-black color scheme and LS3 swap make it a standout entry for the Glendale 2026 auction. It is a machine built for those who want the look of the past with the speed of today.
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Source: mecum.com
