If you’re searching for the ultimate Pontiac bruiser, you could do worse than choose the mighty Firebird Trans Am SD-455. SD stands for “Super Duty,” and in Pontiac-speak that means the 7.5-liter V8 has been prepped for competition work: forged internals, high-flow heads, and a hot cam made it the most powerful American engine offered by a manufacturer in 1973. Way underrated by Pontiac, the big motor made around 371 horsepower and an astonishing 480 ft-lbs. of torque. Just so you wouldn’t be confused about which Firebird you were looking at, Pontiac also loaded the SD-455 up with visual enhancements—the hood bulge shouted “SD-455” to onlookers, and the rear spoiler was likewise emblazoned with large “TRANS AM” script. Interestingly, 1973 was the first year for the soon-to-be-legendary Firebird hood decal, known affectionately as the “Screaming Chicken.” While the decals didn’t make the SD-455 go any faster, it didn’t need any help in that department, as it was capable of 14.5 second quarter-miles dead stock. The SD-455 package was very expensive, which means that not many were produced, making Forza one of the best places to experience this rare bird.
Advertisement
807
pages
1973 Firebird Trans Am SD-455
Advertisement