General Motors built some of the most coveted muscle machines of the 1960s and 1970s, and a handful of them have become blue-chip collectibles worth staggering money. Scarce production runs, race-bred ...

Some legends are whispered about in garages, passed down in stories between gearheads. The 1970 Chevrolet Chevelle SS 454 LS6 is one of them — a name that still makes muscle car fans sit up straighter ...