The Chevy Biscayne 427 sleeper occupies a strange sweet spot in muscle car history, hiding brutal big block performance inside one of the most unassuming full-size bodies Detroit ever stamped. I am ...

Regular Production Option L72 meant 427 cubic inches, and (at least) 425 horsepower, and 460 lb-ft of torque. Chevrolet fans dreamt of having one of those in their Bowtie, but few cars ever got one.

The 1968 Chevrolet Biscayne looked like the kind of car a small-town accountant would drive to work, not a machine that could embarrass big-name muscle at the drag strip. Under that plain sheet metal, ...