Chevy's final big block engine was one of the biggest ever. ... The Vortec 8.1 (also known as the Vortec 8100 or 496) stayed in production for heavy-duty GM vehicles all the way until 2007.

However, the biggest Chevy crate engines include big block varieties as well. Chevrolet's largest displacement and final, big block engine for production vehicles was the 496-cubic-inch 8.1L Vortec.

A walkaround of a blown 496-inch big-block Chevy engine warming up on Westech's Superflow 902 dyno. Related Videos. 0:43. 540-Inch Big-Block Chevy Makes Nearly 1,000 HP At 7,400 RPM On The Dyno.