Nothing says Mopar muscle power like a big Max Wedge cross-ram. Our 505-inch version is shown here waiting for the ride to the dyno where it cranked out 625 hp and 610 lb-ft of torque.

The golden age of muscle spawned many legendary performance engines but these five V8s were among the rarest motors available back then ...

Chrysler's famed Mopar Max Wedge Engine was a powerhouse during the muscle car era, but what sets it apart, and what's the story behind its name?

Mopar had two iconic 426 engines in the 1960s: the Max Wedge and the HEMI. Given the identical displacement, you may be wondering how different they are.

On the dyno at the 2013 AMSOIL Engine Masters Challenge, RRAM's deceptively simple looking Wedge delivered remarkable power, recording 755 hp and 674 lb-ft of torque.

This car still rocks the aluminum hood, fenders, and bumper it got from the factory. The 425-horsepower Max Wedge engine is still highly original, as is the 727 push-button automatic gearbox.

The Hemi and the Max Wedge were both powerful engines in the early 1960s. But a lot of design choices were made that divide these two behemoths.

The 426 Max Wedge and 426 HEMI had the same displacement, but the latter's cylinder heads were radically different, down to the combustion chambers.