The big block ZL1 came with thicker and stronger parts throughout, modified heads for greater flow, and a high-rise intake topped off with a Holley 850-cfm double-pumper carburetor. Chevrolet rated ...
However, its true potential was realized in 1968 when Tasca Ford, a performance-focused dealership, combined parts from the 427 with the 428 block to create a monster engine. Dubbed the Cobra Jet, ...