The 1974 Pontiac Trans Am Super Duty 455 is like the last rock star packing a stadium while everyone else is playing to half-empty dive bars. With muscle car performance on the decline post-1970, Pontiac engineers threw caution—and maybe a few slide rules—to the wind, creating the SD-455, a legendary powerhouse. While other V8s were losing their mojo, this beast roared with race-bred ferocity. It’s as if Pontiac decided, “Who needs subtlety when you’ve got a Super Duty?”
It’s no secret that Muscle Car performance was on the decline after 1970 or so, but Pontiac engineers pressed on when they created the Super Duty Trans Am package, which was still a screamer in 1974. The SD-455 was a remarkable engine, a legit race-bred machine among the plummeting compression ratios and horsepower levels of other V8s of the day. This is a great example of a low-mile and correct 1974 SD-455 Trans Am..
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