Buick’s 1970 GSX combined a 455-cubic-inch V8 with distinctive graphics, front and rear spoilers and a special suspension package. GM’s collection record gives the standard engine 350 hp. The Stage 1 version is a separate specification; the GSX name does not automatically identify it.
It beats the 442 for making the performance package visually unmistakable. The Boss 429 wins above it on engine distinction, though Buick’s more complete presentation can persuade readers who care about the whole car. Sixth judges identity, not drag-race results.
Sources: GM history.
.jpg){kind=link}