Brett Chmura’s 1983 Chevy Monte Carlo SS started life as a mild 175-horsepower NASCAR homologation special, built at a moment when Chevrolet desperately needed an aero nose to keep winning on Sunday. Three generations after his grandfather opened the family’s first repair shop in 1959, Brett’s version makes roughly 1,000 horsepower. Read on to find out how a shade-tree family legacy turned a stock body style into something the factory never imagined.