Book excerpt: Naturally aspirated Mopar Wedge big-blocks are quite capable of producing between 600 to 900 horsepower. This book covers how to build Mopar's 383-, 400-, 413-ci, 440-ci engines to these power levels. Discussed is how to select a stock or aftermarket block for the desired performance level. The reciprocating assembly is examined in detail, so you select the right design and material for durability and performance requirements. Cylinder heads and valve train configurations are crucial for generating maximum horsepower and torque and this volume provides special treatment in this area. Camshafts and lifters are compared and contrasted using hydraulic flat tappet, hydraulic roller and solid flat tappet cams. Also, detailed engine builds at 600, 700, 800, and 900 horsepower levels provide insight and reveal what can be done with real-world component packages.