Engines » Two of the most rare Pontiac engines ever produced: 1969 RAV (left) and 1963 SD 421 (right), both of these built by Butler Performance

We do stock appearing and rare factory engines, including 389 Tripower, SD421, RAII, RAIII, RAIV, HO455, SD455, and RAV We can internally modify(strokers, head porting etc.) any of these engines to greatly improve power and durability while maintaining a totally stock appearance.