1964-’65 NY World’s Fair Animated Cut-Away 396 Big-Block Engine

The Mark IV big-block engine was intended to be a replacement engine for the W-Series 348/407/427 truck engine. But very quickly in the development phase it was discovered that the engine was a torque monster.

When released in spring of 1965 in the Corvette as the 396/425 L78 for only $292, it was obvious that it was easier to make big horsepower and torque with the new big-block to the more exotic and expensive ($538) L84 Fuelie. The rest is history. Read More


1963: Corvette’s Bunkie Knudsen Produces All New Mark IV Big Block Design

by Scott Teeters as written for Vette Views January 4, 1963 – GM President and Chief Operating Officer, Jack Gordon gives Chevrolet General Manager, Bunkie Knudsen approval to proceed with an all-new big-block engine to replace the W-Series 409/427 engine Dateline January 2016: When you think of “big-block” Chevy engines, the Mark IV, aka “Porcupine,”… Read More