Besides being the largest displacement V8 engine fitted to a road-going series-production pickup truck, the 8.1 Vortec V8 is General Motors' last-ever old-school big block engine.

Chevrolet's ZZ632/1000 big-block crate engine makes 1,004 horsepower, 876 lb-ft of torque, and has a suggested price of around $48,000.