The Chevrolet big ... valve heads, more commonly called porcupine heads for the differing valve-stem angles you see with the valve covers off. Chevy built both a 409 Mark II, and a 427 Mark ...

There were many variations on the 427 big-block theme ... We proceeded and found the big-block to favor 36 degrees of total timing, which is not at all unusual for a Chevy Rat.

Over the years, the 427-cubic-inch crate engine has taken many forms. Originally, the 427 was offered as a big block ... in long block form and includes components like the valve covers, front ...

By 1961, the Chevy engineering team in charge of developing performance motors faced a new challenge. The Mark I (W-series) big block ... of how the valve stems looked when the covers were removed ...

As Chevrolet's lineup of cars and pickup trucks grew through the 1950s, the need for more powerful engines also grew, leading to the genesis of the Chevy big block ... of the valve cover seating ...

Beneath the Chevy Corvette Big Block hood is the legendary L88 427. The rat cage cover is in place in lieu of the standard air filter. Massive chrome valve covers are a dead giveaway that this is ...

The ‘Vette has a 427ci Big Block Chevy V8 engine under the hood ... Such as the U.S. Mags wheels, side exhaust with headers, custom valve covers, or the “100% bone stock and original ...

This has been the battle cry of big block fans everywhere, and for good reason. A Chevy big block brings ... don't just crank the volume up — pop the valve covers and take a look.