This 1970 Chevrolet Nova hides a built 355 small-block — forged pistons, a solid cam, roller rockers, and a Holley four-barrel — behind a plain, straight body with no rust. It’s a modern take on the same sleeper formula that made factory Nova SS models, with their optional 375-horsepower 396 big block, a favorite among budget-minded muscle car builders. There’s nothing about its looks that hints at what’s under the hood.