Factory T-Top: 1977 Pontiac Grand Prix SJ | Barn Finds
The '77 Grand Prix was more of a highway cruiser than a muscle car, with its ¼-mile ET of 18.4 seconds reflecting the impact of tightening emission regulations. A 400-equipped 1973 Grand Prix would have completed the same journey in 16.6 seconds, while opting for the 455-SD slashed the time to 15.1 seconds.
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