ALL 
From the article: Affordable performance attracts hot rodders. Few platforms lend itself better than Chevrolet’s big-block V-8. When introduced in 1965, its generous bore diameter, excellent rod-to-stroke ratio, and large intake and exhaust ports catapulted the Rat motor to the forefront of competitive racing. And if it weren’t potent enough in stock form, a strong aftermarket instantly emerged for those seeking a performance edge.
