In 1997 Chevrolet did the unthinkable: they re-designed the most popular and most modified engine in American history. The Chevrolet small-block V-8 made its debut in 1955, and with its arrival, Chevrolet instantly leaped to the forefront in the minds of hot rodders and performance enthusiasts alike. While the engine grew in displacement and technology over the next 30 years, its basic design remained unchanged . . . until 1997, when the Generation III LS1/LS6 engine design was introduced. The LS1 engine first appeared in the 1997 Corvette, and soon followed in the Camaro Firebird and thousands of full-size Chevy trucks and SUVs. It also powers the hot new Pontiac GTO! This book is essential for the enthusiast who wants to get the most performance out of this new engine design but is only familiar with the older Chevy small-blocks. Covered is everything you need to know about these engines, including the difficult engine removal and installation, simple engine bolt-ons, electronic controls for the Generation III engine, and detailed engine builds at four different power levels.