Introduced in 1958 by the W-series Mark 1, the big-block V8 started out with 5.7 liters and up to 315 horsepower in the first year of production. Mere days ago, Chevrolet Performance revealed the ZZ632/1000 crate motor, a big block unlike any other before it. Scheduled for delivery in early 2022, the 10.35-liter colossus is much obliged to crank out 1,004 horsepower and 876 pound-feet (1,187 Nm) of torque on 93-octane gas.