For perspective, Hot Rod magazine managed a 13.44-second quarter 108.17 mph in a Chevelle equipped with the LS6 V8. Even with 3.55 gearing, the best that Car Craft could manage was a 13.12 at 107.01.

I n the world of collectibles, the 1970 Chevy Chevelle SS 454 LS6 isn’t just a muscle car, it’s a legend. On par with Rolex watches and vintage Gibson guitars, it’s a top-tier find in the ...