A:The Pontiac 151-inch (2.5L) L4 Iron Duke rocker arm fulcrum-to-tip distance is greater than a Chevy small-block, plus the Chevy small-block rocker has a 1.51:1 ratio, while the Pontiac uses a 1.71:1 ...

Chevrolet is known for producing a lineup of powerful small block Chevy crate engines. However, the biggest Chevy crate engines include big block varieties as well. Chevrolet's largest displacement ...

Capable of producing massive torque with a proverbial yawn, the long-running big block from Chevy was born purely out of necessity in 1958, a few years after the small block. With cars getting heavier ...